exam Maths Puzzle Numerical Ability

Is 14798678562 a perfect square? Is 15763530163289 a perfect square?

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exam Other Question

Mary is 20 years old. She is twice as old as Ann was when Mary was as old as Ann is now. How old is Ann is now? I think I have the answer to this problem, but I am not sure. Can someone please check my work?

Given f(x)=5x^2-3x+1, find f(-2):

I got 27, is this correct?

Thank you for your help!