Level 2
Johnny has a bag of sweets to distribute to his students. If he gives each student 5 sweets, he will be short of 3 sweets. If he gives each student 7 sweets, he will be short of 13 sweets. How many sweets does he have in his bag?
Level 3 PSLE
Ben had $15 more than Lina at first.
After Ben gave some of his money to Lina, he had $21 less than Lina. How much money did Ben give to Lina?
Level 2 PSLE
The mass of a box with 50 identical glass marbles is 750 g. When 20 of the marbles are removed, the mass of the box with the remaining marbles is 510 g. What is the mass of each glass marble?