10 EASY ARITHMETIC TRICKS

Math can be terrifying for many people. This list will hopefully improve your general knowledge of mathematical tricks and your speed when you need to do math in your head.

1. The 11 Times Trick

We all know the trick when multiplying by ten – add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11? This is it:

Take the original number and imagine a space between the two digits (in this example we will use 52:

5_2

Now add the two numbers together and put them in the middle:

5_(5+2)_2

That is it – you have the answer: 572.

If the numbers in the middle add up to a 2 digit number, just insert the second number and add 1 to the first:

9_(9+9)_9

(9+1)_8_9

10_8_9

1089 – It works every time.

2. Quick Square

If you need to square a 2 digit number ending in 5, you can do so very easily with this trick. Mulitply the first digit by itself + 1, and put 25 on the end. That is all!

25² = (2x(2+1)) & 25

2 x 3 = 6

625

3. Multiply by 5

Most people memorize the 5 times tables very easily, but when you get in to larger numbers it gets more complex – or does it? This trick is super easy.

Take any number, then divide it by 2 (in other words, halve the number). If the result is whole, add a 0 at the end. If it is not, ignore the remainder and add a 5 at the end. It works everytime:

2682 x 5 = (2682 / 2) & 5 or 0

2682 / 2 = 1341 (whole number so add 0)

13410

Let’s try another:

5887 x 5

2943.5 (fractional number (ignore remainder, add 5)

29435

4. Multiply by 9

This one is simple – to multiple any number between 1 and 9 by 9 hold both hands in front of your face – drop the finger that corresponds to the number you are multiplying (for example 9×3 – drop your third finger) – count the fingers before the dropped finger (in the case of 9×3 it is 2) then count the numbers after (in this case 7) – the answer is 27.

5. Multiply by 4

This is a very simple trick which may appear obvious to some, but to others it is not. The trick is to simply multiply by two, then multiply by two again:

58 x 4 = (58 x 2) + (58 x 2) = (116) + (116) = 232

6. Calculate a Tip

If you need to leave a 15% tip, here is the easy way to do it. Work out 10% (divide the number by 10) – then add that number to half its value and you have your answer:

15% of $25 = (10% of 25) + ((10% of 25) / 2)

$2.50 + $1.25 = $3.75

7. Tough Multiplication

If you have a large number to multiply and one of the numbers is even, you can easily subdivide to get to the answer:

32 x 125, is the same as:
16 x 250 is the same as:
8 x 500 is the same as:
4 x 1000 = 4,000

8. Dividing by 5

Dividing a large number by five is actually very simple. All you do is multiply by 2 and move the decimal point:

195 / 5

Step1: 195 * 2 = 390
Step2: Move the decimal: 39.0 or just 39

2978 / 5

step 1: 2978 * 2 = 5956
Step2: 595.6

9. Subtracting from 1,000

To subtract a large number from 1,000 you can use this basic rule: subtract all but the last number from 9, then subtract the last number from 10:

1000
-648

step1: subtract 6 from 9 = 3
step2: subtract 4 from 9 = 5
step3: subtract 8 from 10 = 2

answer: 352

10. Assorted Multiplication Rules

Multiply by 5: Multiply by 10 and divide by 2.
Multiply by 6: Sometimes multiplying by 3 and then 2 is easy.
Multiply by 9: Multiply by 10 and subtract the original number.
Multiply by 12: Multiply by 10 and add twice the original number.
Multiply by 13: Multiply by 3 and add 10 times original number.
Multiply by 14: Multiply by 7 and then multiply by 2
Multiply by 15: Multiply by 10 and add 5 times the original number, as above.
Multiply by 16: You can double four times, if you want to. Or you can multiply by 8 and then by 2.
Multiply by 17: Multiply by 7 and add 10 times original number.
Multiply by 18: Multiply by 20 and subtract twice the original number (which is obvious from the first step).
Multiply by 19: Multiply by 20 and subtract the original number.
Multiply by 24: Multiply by 8 and then multiply by 3.
Multiply by 27: Multiply by 30 and subtract 3 times the original number (which is obvious from the first step).
Multiply by 45: Multiply by 50 and subtract 5 times the original number (which is obvious from the first step).
Multiply by 90: Multiply by 9 (as above) and put a zero on the right.
Multiply by 98: Multiply by 100 and subtract twice the original number.
Multiply by 99: Multiply by 100 and subtract the original number.

Bonus: Percentages

Yanni in comment 23 gave an excellent tip for working out percentages, so I have taken the liberty of duplicating it here:

Find 7 % of 300. Sound Difficult?

Percents: First of all you need to understand the word “Percent.” The first part is PER , as in 10 tricks per listverse page. PER = FOR EACH. The second part of the word is CENT, as in 100. Like Century = 100 years. 100 CENTS in 1 dollar… etc. Ok… so PERCENT = For Each 100.

So, it follows that 7 PERCENT of 100, is 7. (7 for each hundred, of only 1 hundred).
8 % of 100 = 8. 35.73% of 100 = 35.73
But how is that useful??

Back to the 7% of 300 question. 7% of the first hundred is 7. 7% of 2nd hundred is also 7, and yep, 7% of the 3rd hundred is also 7. So 7+7+7 = 21.

If 8 % of 100 is 8, it follows that 8% of 50 is half of 8 , or 4.

Break down every number that’s asked into questions of 100, if the number is less then 100, then move the decimal point accordingly.

EXAMPLES:
8%200 = ? 8 + 8 = 16.
8%250 = ? 8 + 8 + 4 = 20.
8%25 = 2.0 (Moving the decimal back).
15%300 = 15+15+15 =45.
15%350 = 15+15+15+7.5 = 52.5

Also it’s usefull to know that you can always flip percents, like 3% of 100 is the same as 100% of 3.

35% of 8 is the same as 8% of 35.

CHOOSE A RIGHT CAREER

After completion of their academics many talented individuals simply take decisions without thinking about the further consequences & future aspirations, the corporate sectors attract individuals with good packages & comfort facilities compelling individuals to take up their first job, but if the individual chooses the job which is not of his/her career interest/choice there wont be any Job satisfaction. As a individual join in the job which is based upon his/her career interests, it leads to successful career, career growth & profitable to the company.

Sometimes individuals choose Engineering,Medicine as their interest in the field ,but some simply choose them as their fathers aim which he tries to force on his child the individual pursue it as his career choice without thinking of the consequences,with a nil knowledge of his aspirations ,after they complete the course and step into the big world they realize that its not their cup of tea, to tell in other way individual feels dissatisfaction it means that he choose a wrong career.Dissatisfaction creates many financial hurdles, sometimes the individual need to work to fulfill his financial needs or his daily wants.When an opportunity is given to work for the career he is interested he should never take a back-step he should try to proceed so that he can enjoy his work instead of feeling burden or discomfort, there itself your talent comes out,you’ll complete the given task with passion and creativity it its the work you are interested to do.

If the food is delicious it gives good taste ,similarly if you do good in your work you’ll find it successful & worthwhile. A higher position or money may try to change your path, but still you should opt the career which is completely suitable for you,then itself you can fulfill your responsibilities perfectly & accurately. If you try to do a task which is not interesting for you it may lead others to complaint or comment on your way of work,you loose interest to perform any task you might not take it as a big hurdle but it leads to your carelessness towards work& make companies targets look big and stressful.

Usually people start their career in a lower level position and slowly try to use their skills & talent to get to the higher positions in the company. When a opportunity is given we should try to enhance our skills and knowledge which also leads to the economical growth of your company. We to prove ourselves that we are capable of doing any task by showing better results in the company. Choosing a right career leads to individuals career growth & company growth as well….

Nokia Launches X1-00 Cheapest Music Phone

Nokia launched X1-00 which is not only cheap but also packed with lots of features. This phone is mainly for music lovers and entry-level customers. The phone also has large and powerful loudspeaker to listen music without headset with frequency tweaked so that it remains undistorted at higher volumes.

Features of Nokia X1-00

• 1.8 inch, 128 x 160 pixel 65k  Color TFT Display
• Weighs 91g and 16mm thick.
• Numeric Keypad , NaviKey with Three Dedicated Music Keys
• Symbian S30 OS
• FM Radio, 3.5mm audio jack
• Shuffle feature for song mix up and One Key Playlist creator
• Up to five phone books with 500 entries for different users.
• MicroSD expansion slot with up to 16GB support.
• Speaking alarm clock, Calculator, Torch, 5 pre-installed games.
• 1320 mAh battery with 13.1 h talk time and 61 days standby and 38 h music playback.

This is great entry-level music phone that offers lots of features like great loudspeaker, FM Radio and excellent battery life. This is price 35 Euros which is about Rs. 2,200. This phone will be available in Orange and Ocean blue colors and will launch the next month in selected countries.

How to Make Drop-Down Labels Menu in Blogger?

If you host your blog on the Blogger (blogspot) platform, and you have significant number of labels on your sidebar, you might be looking for a suitable solution to show them, but also save the expensive space for other elements. These two tasks can be achieved by using the option of displaying your labels in a simple drop-down menu. Many bloggers already use drop-down option for long lists of labels (categories), which minimizes clutter and enables information to be displayed in the sidebar neatly.
While Blogger offers a dropdown menu option for the Archives widget, you will not be able to find an option to do the same for your labels. In this post, we will review two ways you can use to convert your regular Label list into a drop-down list.

Method 1
1. Template Backup. As usual, when you just think about making any changes to the template code, it is strongly recommended to make a complete back up of your existing template. This ensures you can easily roll back and restore your current, working template if you make any mistake.
To make a back up of your current template, go to Layout > Edit HTML in your Blogger dashboard and click the “Download Full Template” link near the top of the page. This will offer the option to save your current Blogger template as an XML file to your local computer. Be sure to save this file in a location you can easily find later.
2. Ensure you have a “Labels” widget in your Blogger template. Ifyou do not have a Labels widget activated in your template, go to Layout>Page Elements and add a Labels widget using the “Add a Gadget” link above your sidebar. Definitely, your posts should be labeled as well to transfer the related content to the activated widget.
3. Go to Layout > Edit HTML in your Blogger dashboard. This time, DO NOTcheck the "Expand Widget Templates" checkbox!
4. Search for the following code (note that the name of the label in your template might be slightly different):<b:widget id='Label1' locked='false' title='Labels' type='Label'>
5. Replace the above code, with this:<b:widget id='Label1' locked='false' title='Labels' type='Label'>
<b:includable id='main'>
<b:if cond='data:title'>
<h2><data:title/></h2>
</b:if>
<div class='widget-content'>
<br/>

<select onchange='location=this.options[this.selectedIndex].value;' style='width:200px'>
<option>Labels</option>
<b:loop values='data:labels' var='label'>
<option expr:value='data:label.url'><data:label.name/>
</option>
</b:loop>
</select>

<b:include name='quickedit'/>
</div>
</b:includable>
</b:widget>
6. Modifying the Widget. To alter the phrase “Choose a label to view” which is visible when the drop down menu is contracted, you will need to go to the Layout>Edit HTML page of your Blogger dashboard and check the “Expand widget templates” box. Then search for this phrase in your template code. Simply alter the wording of this phrase to something more suitable for your blog, being careful not to alter any of the surrounding code.
To clarify, here is the line of code where adjustments will be made. The text which can be altered is highlighted in red:<select onchange='location=this.options[this.selectedIndex].value;'><option>Choose a Label to View</option><b:loop values='data:labels' var='label'>



Method 2As you understand, the first steps of the code modification will be similar to the method 1, so I will skip the introduction, which you need to backup the template first before doing any modifications.
3. Go to Layout > Edit HTML in your Blogger dashboard. This time, CHECKthe "Expand Widget Templates" checkbox!
4. Now look for the following code in your template

<b:widget id='Label1' locked='false' title='Labels' type='Label'>
<b:includable id='main'>
<b:if cond='data:title'>
<h2><data:title/></h2>
</b:if>
<div class='widget-content'>

 <ul>
   <b:loop values='data:labels' var='label'>
     <li>
       <b:if cond='data:blog.url == data:label.url'>
         <data:label.name/>
       <b:else/>
         <a expr:href='data:label.url'><data:label.name/></a>
       </b:if>
       (<data:label.count/>)
     </li>
   </b:loop>
   </ul>
<b:include name='quickedit'/>
</div>
</b:includable>
</b:widget>
5. Note that you need to replace only the part of the displayed code IN BLUE. All the remaining text is provided for easy reference. So, replace the text IN BLUE with the text IN RED below:

<br />
<select onchange='location=this.options[this.selectedIndex].value;'>
<option>Select a label</option>
<b:loop values='data:labels' var='label'>
   <option expr:value='data:label.url'><data:label.name/>
      (<data:label.count/>)
   </option>
</b:loop>
</select>

No matter, which method you choose, at the end of the performed modification save the template and back it up with a new name. Do not overwrite the backup file you created at the beginning, since you want to try the option for some time and decide you do not see any problems or performance drawbacks.

Sources and Additional Information:http://webupd8.blogspot.com/2009/03/drop-down-menu-bloggers-labels.htmlhttp://www.bloggingtips.com/2009/06/01/blogger-tip-create-a-dropdown-menu-for-your-labels/http://thirdworldchaos.blogspot.com/2008/05/blogger-hack-create-drop-down-labels.htmlhttp://www.blogspottutorial.com/2008/09/making-label-in-drop-down-menu.html

CHANGING THE START BUTTON TEXT

This tutorial will walk you through how to modify system files in order to change the text that is displayed on the start menu’s “start” button.

NOTE: The steps outlined in this tutorial are to be followed at your own risk. We have tested it and it does work, but if you do something wrong your machine may become inoperable. I am doing this on a Windows XP Professional machine with Service Pack 2. There are no difference between professional and home for this tutorial. There are differences depending on the theme you are using. If something were to go wrong, simply go into safe mode by pressing F8 during boot and select Safe Mode. Then go into the registry and change our Shell value back to regular “explorer.exe”.

To complete this tutorial we will need to use a tool called a Hex Editor and/or a Resource Editor. These tools allow us to modify files that have already been compiled into DLL’s or EXE’s. A very good one to do this, that is free, is Resource Hacker and can be acquired by going to ResHackers Website (http://www.angusj.com/resourcehacker/). Scroll down on the page until you see the link to download the file as below:

Save the file to Disk once the download screen appears. Once the download has completed, open the file (which is zipped and you will need to unzip it before use).

You should now have the above file on your desktop (or wherever you extracted the files to).

You should see the above files within the folder. ResHacker.exe is the executable that we will be running. Now we need to prep things for the image swap. We will be modifying the “Explorer.exe” file located in your Windows directory, normally “C:\Windows”. Let’s open the files by selecting file and then open.

We now want to navigate to our Windows directory and double-click on explorer.exe to open the file as shown below:

We now have the file open in our tool and you ResHacker window should look like the following:

The objects that we are going to be modifying are located under the string table section and under the folders 37 and 38. Expand them and your reshacker should now look like this:

The reason we need to modify two of these files is that there are two strings for the start button, one which has classic windows style and one for Windows XP styles. These are shown below:

If you select the “1033” option in the 37 folder, you will get the following in the right pane which you can see shows “start” on the line that is labeled 578. This instance of the “start” text is for the Windows XP:

If you select the “1033” option in the 38 folder you will see the following in the right pane which shows you “Start” on the line labeled 595. This instance of start if for the classic view.

Once you start changing the text in the 1033 option in the 37 folder you will notice that the Compile Script button lights up as below:

Once you type what you want click on this button. If it completes successfully the button will become greyed out again. Repeat this step for the 1033 in the 38 folder as well. Keep in mind that you do NOT have to make them the same thing. Also, they do not have to be limited to a certain number of letters and Windows will re-size the button to fit whatever text is placed there. Out next step is to prep where we are going to save our newly created file. For weird reasons you can not rename this file and place it in the same folder. You have to create a folder for it specifically, or place it in another system folder. I am going to create a folder in the Windows directory called “start” as shown here:

You can now go back to ResHacker and select File and then Save As:

Now navigate to our “start” folder located in C:\Windows\ and save the file as explorer.exe. as shown here:

Now we can close ResHacker and start to tell our system where to get the new file from. To do this we will need to access RedEdit and modify the registry a little bit. To do this goto to Start and the select run and type RegEdit as shows below:

Once the registry editor opens up, you need to navigate to the following Key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Once you select the WinLogon folder, the right pane of the editor should look like this:

Scroll down in the right pane and look for the Key named Shell as shown:

Double-click on the key to bring up the window to modify its entry. Type the following in the box and click on OK.

Note that I did intend to use the forward slash. Please ensure you use the correct slash. Now you should be able to reboot your computer and see the effects of what you have done. You should see what you type no matter which version of styles you are using (To change styles – right-click on the desktop and select properties and go to the appearance tab). Here is the finished result: