book Maths Puzzle Numerical Ability

what is 9+p<14

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book Other Question

If N(t)=N(0)a^pi^t

How would you determine:
1) N(0)
2) pi

Thanks Five divided by the sum of a number and 1, minus the quotient of 3 and the difference of the number and 1 is equal to 6 times the reciprocal of the difference of the number squared and 1. What is the number?
Could be 7, -1, -1/4, or 4