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