Write down 56 as the product of its prime factors.
56 / 2 = 2828 / 2 = 1414 / 2 = 77 / 7 = 1so, 56 = 2x2x2x7 = 23x7Example of a non calculator GCSE paper question, higher tier
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The length of a plank of wood is 80cm to the nearest 1cm. What is the largest and smallest possible value for the actual length of the plank?
How do I solve a pair of simultaneous equations?
Make x the subject of the formula: 3(2x-y)=ax-4