How to: find a percentage of a quantity

17 05 2010

Find 27% of 250. Need some help with how to do this? If yes, read on!

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Divisibility tricks

2 05 2010

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 »