exam Maths Puzzle Numerical Ability

A "simple square" is any integer greater than 1 that has only three positive integer factors -- itself, its square root, and 1. Which of the following is a simple square?

(A) 12

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exam Other Question

A computer bulletin board service charges a flat fee of $10 per month or $4 per month plus $.10 for each minute the service is used. For how many minutes must a person use this service for the cost to exceed $10? I have one more word problem, I hope that's ok.

The loudness L, in bels (after Alexander Graham Bell), of a sound of intensity I is defined to be

L = log I / I base 0, wher