book Maths Puzzle Numerical Ability

a fly wheel has 72 teeth and a starter drivegear has 15 teeth. Find the ratio of fly wheel teeth to drive gear teeth.

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book Other Question

How would you solve this problem? The perimeter of the cover of an address book is 14 inches, and the diagonal measures 5 inches. What are the length and width of the cover? what is the value of "y" in the equation (Y^4+4Y+1=0)