Jen has some balls in a bag. The number of balls is less than 20. If she gives 3 balls to each pupil, she will have none left. If she gives 7 balls to each pupil, she will need 16 more balls.
- How many pupils does Jen have?
- How many balls are there in the bag?
(a)
Total extra number of balls that Jen will need = 16
Number of extra balls that Jen will give to each pupil
= 7 - 3
= 4
Number of pupils that Jen has
= 16 ÷ 4
= 4
(b)
Number of balls that Jen has
= 3 x 4
= 12
Answer(s): (a) 4; (b) 12