1. Evaluate \( 202^2_{three} - 112^2_{three}\)

If \(y = 23_{five} + 101_{three}\), find y, leaving your answer in base two

Given that sin (5x - 28)^o = cos (3x - 50)^o,0 < x < 90^o, find the value of x

Solve for t in the equation \(\frac{3}{4}t+\frac{1}{3}(21-t)\) = 11,

A school girl spends \(\frac{1}{4}\) of her pocket money on books and \(\frac{1}{3}\) on dress. What fraction remains?