2025 IGCSE 0580 May/June P42 Q17

Alex invests \(\$400\) at a rate of \(2.3\%\) per year simple interest.

Find the total amount Alex has at the end of 5 years.[3]

Virat has \(\$100\) to spend.

In February he spends \(\$x\).

In March he spends \(10\%\) more than he spends in February.

In April he spends \(10\%\) more than he spends in March.

At the end of April, Virat has \(\$33.80\) remaining.

Find the value of \(x\).[3]

Bobbie invests \(\$500\) in an account that pays compound interest each year.

At the end of 17 years, the value of Bobbie’s investment is \(\$700.13\).

Find the value of Bobbie’s investment at the end of 20 years.[4]