Tag: Mathematics

How to create a secure, memorable PIN number

June 22nd, 2009 | 1 Comment

Usually people will use their existing numbers, such as telephone number, house number, birth date or social security number as their PIN number for banking. These numbers are easy to remember, nevertheless easy to be broken.

This article will give an idea on how to create a secure, but memorable PIN number.

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How to add two numbers less than hundred rapidly

January 24th, 2009 | No Comments

Adding two numbers less than 100 is easy. For instance, 29 + 45 = 74. However, how fast can you do it. Can you do at least sixty additions within one minute. Actually, you can do it, but, with some practices, using the simple technique that will be discuss in this article.

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Simple division technique

November 6th, 2008 | No Comments

This division technique can only be used if the divisor could be factorized.

Example 1:

272 ÷ 16 = 17

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Remainder when a number is divided by a nine

November 3rd, 2008 | 3 Comments

Do you know that there is an easy way to find the remainder when a number is divided by 9?

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Squaring numbers more than 100

October 24th, 2008 | No Comments

This technique is suitable for finding the square of number that is more than 100.

Example 1:

103 x 103 = 10609

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