book Maths Puzzle Numerical Ability

6x+(5x-8

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book Other Question

Simplify.

1) (ab)3
2) (-3x)2
3) (-x2)3
4) -3x(x2+2) It takes Tom 4 hours to build a fence. If he hires Jack to help him, together they can do the job in just 3 hours. If jack built the same fence by himself, how long would it take him??

Thanks for answering!:-)