Tina has some balls in a bag. The number of balls is less than 30. If she gives 7 balls to each pupil, she will have none left. If she gives 10 balls to each pupil, she will need 12 more balls.
- How many pupils does Tina have?
- How many balls are there in the bag?
(a)
Total extra number of balls that Tina will need = 12
Number of extra balls that Tina will give to each pupil
= 10 - 7
= 3
Number of pupils that Tina has
= 12 ÷ 3
= 4
(b)
Number of balls that Tina has
= 7 x 4
= 28
Answer(s): (a) 4; (b) 28