Find the smallest number by which 252 can be multiplied to obtain a perfect square

Simplify \( \frac{0.0324 \times 0.00064}{0.48 \times 0.012} \)

If P = 18, Q = 21, R = -6 and S = -4, Calculate \( \frac{(P-Q)^3+S^2}{R^3} + S^2 \)

Divide the L.C.M of 48, 64, and 80 by their H.C.F

Find the reciprocal of \( \frac{\frac{2}{3}}{\frac{1}{2}+\frac{1}{3}} \)

Evaluate (212)3 - (121)3 + (222)3

Udoh deposited ₦150.00 in the bank. At the end of 5 years the simple interest on the principal was ₦55.00. At what rate per annum was the interest paid?

If Musa scored 75 in biology instead of 57, his average mark in four subjects would have been 60. What was his total mark?

Two chords QR and NP of a circle intersect inside the circle at x. If RQP = 37o, RQN = 49o and QPN = 35o, find PRQ