Level 3
Adam get 3 stickers for every 2 books that he reads.
He reads 8 books.
He can exchange a certain number of stickers for every 5 pens.
If Adam receives 15 pens,
how many stickers does he need to exchange for 1 pen?
Level 3 PSLE
Gerry was given a fixed amount of allowance each month. In January, he spent $80 and saved the rest. In February, he spent 10% less and his savings increased by 25%. How much was Gerry's allowance for each month?
Level 3
A coin bank contains some twenty-cent and fifty-cent coins in the ratio of 2 : 5.
When 10 fifty-cent coins are taken out and exchanged with some twenty-cent coins of the same value,
the ratio became 8 : 9.
Find the sum of money in the coin box in dollars.
