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Maths Puzzle
Numerical Ability
If y = 39 and y = -x/4 + 15, what is the value of X?
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Two mathematicains were out for a walk. In answering the question of how many children she had, one of the mathematicians replied that she had 3 children and the product of their
How do u prove this?...Show that 3 divides n^3-n for all positive integers n. And does 4 divide n^4-n for all positive intgers n? AND i need to use proof by induction i think, i get the first part but then get stuck at the end...please help