Jen has some marbles in a bag. The number of marbles is less than 20. If she gives 4 marbles to each pupil, she will have none left. If she gives 9 marbles to each pupil, she will need 20 more marbles.
- How many pupils does Jen have?
- How many marbles are there in the bag?
(a)
Total extra number of marbles that Jen will need = 20
Number of extra marbles that Jen will give to each pupil
= 9 - 4
= 5
Number of pupils that Jen has
= 20 ÷ 5
= 4
(b)
Number of marbles that Jen has
= 4 x 4
= 16
Answer(s): (a) 4; (b) 16