Abbreviations used: eg P3, U1.1, Q1 refer to Conquer Problem Sums for Primary 3, unit 1.1, question 1.
P4, U1.12, Q4
David had 5 times as many marbles as Serene. After David had given 32 of his marbles to Serene, they had an equal number of marbles in the end. Find the number of marbles each of them had at first.
P4, U2.10, Q5
There is a total of 510 children in the school hall. 3/4 of the boys is equal to 2/3 of the girls. How many more girls than boys are there in the hall?
P4, U2.10, Q9
Esther had $350 more than Kevin. Esther spent 3/4 of her money and Kevin spent 4/7 of his money. In the end, Kevin and Esther had the same amount of money left. Find the amount of money Kevin had at first.
P4, U2.10, Q10
At the graduation ceremony, there were 30 less boys than girls. After 3/5 of the boys and 5/8 of the girls had left the hall for recess, there was an equal number of boys and girls that remained behind. Find the number of boys who were presented at the graduation ceremony at first.
