exam Maths Puzzle Numerical Ability

Which is a perfect square?

1,945
1,000
351.56
730
169

Read Solution (Total 0)

exam Other Question

y^5 - 3y^3 + 8y^2 / 5y

I factored it out as much as I could.
How do you simplify a rational expression like: t^2-25/t^2+t-20, whats the answer?