exam Maths Puzzle Numerical Ability

Can someone help me on this problem?

I need a list of all the prime numbers between 45 and 80.

Thanks,
Sher

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exam Other Question

Solve each of the following systems by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.
10x +2y = 7
Y = -5x + 3 Solve for x

25x^2=13

Having trouble with this one. Thanks in advance.