Min has some marbles in a bag. The number of marbles is less than 40. If she gives 6 marbles to each pupil, she will have none left. If she gives 10 marbles to each pupil, she will need 20 more marbles.
- How many pupils does Min have?
- How many marbles are there in the bag?
(a)
Total extra number of marbles that Min will need = 20
Number of extra marbles that Min will give to each pupil
= 10 - 6
= 4
Number of pupils that Min has
= 20 ÷ 4
= 5
(b)
Number of marbles that Min has
= 6 x 5
= 30
Answer(s): (a) 5; (b) 30