Simple Equations - JSS3 Mathematics Past Questions and Answers - page 2

John has 2/5  of a cake left. If he wants to save 1/10  of what remains for later, how much cake does he save?

If 2/3𝑦=12, what is the value of 𝑦?

Mary spends 4/7  of her monthly salary on rent. If her salary is $2800, how much does she spend on rent?

Solve for 𝑧 in the equation 5/4𝑧=15.

If 𝑥^2=5, what is 𝑥?