Lucy has some balls in a bag. The number of balls is less than 30. If she gives 4 balls to each pupil, she will have none left. If she gives 8 balls to each pupil, she will need 20 more balls.
- How many pupils does Lucy have?
- How many balls are there in the bag?
(a)
Total extra number of balls that Lucy will need = 20
Number of extra balls that Lucy will give to each pupil
= 8 - 4
= 4
Number of pupils that Lucy has
= 20 ÷ 4
= 5
(b)
Number of balls that Lucy has
= 4 x 5
= 20
Answer(s): (a) 5; (b) 20