A neat trick to multiply any number by 25 in your head nice and quickly:

Credit goes to the mathchat blog!

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Making maths interesting and fun for everyone

A neat trick to multiply any number by 25 in your head nice and quickly:

Credit goes to the mathchat blog!

Share this post with your friends:

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Tags: arithmetic, mental arithmetic, multiplication, multiply, trick

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Tags: cent, division, latin, multiplication, per, percent, percentage, percentage of a quantity, percentage of an amount

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Is 6783043998 divisible by 3 without getting a remainder? Is it divisible by 7, 9 or 11? You don’t have to resort to the calculator to work this out, there are some great tricks for testing the divisibility of numbers.

Here’s the rules for checking divisibility by numbers between 1 and 10: Read the rest of this entry »

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Tags: Divisibility, division, factor, long division, multiple, multiplication, multiply, short division, test, test for divisibility

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