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56 = 2 x 2 x 2 x 7.Prime numbers are the basic building blocks of all numbers. They can't be divided by any number apart from 1, or themseslves.

2x + y = 17 x-y = 4 ---> x = 4 + y2(4+y) + y = 17 ------> 8 + 2y + y = 17 -----> 8 + 3y = 17 --------> 3y = 9 -----> y=3 x = 4+y ------> x = 7

X= 3y= 2

A simultaneous equation is calculated to find the pair of co-ordinates where two straight lines cross on a graph, so the question you've probably been asked is to 'solve' a pair of linear equations. This ...

Maths is very important in real life. You use it day to day from basic addition and subtraction to working out percentage discounts in shops. Some of the more complex maths like algebra is used in fields ...