Adam earns $3 for every car he washes.
He gets $5 bonus for every 5 cars he washes.
- How much will Adam earn if he washes every 5 cars?
- If Adam wants to earn $23, how many cars must he wash?
- If Adam wants to earn $60, how many cars must he wash?
- If Adam wants to earn $46, how many cars must he wash?
(a)
Amount that Adam will earn for washing every 5 cars
= 3 x 5 + 5
= $20
(b)
Number of sets of $20
= 23 ÷ 20
= 1 r 3
Number of cars in 1 set
= 1 x 5
= 5
Number of extra cars that he has to wash
= 3 ÷ 3
= 1
Total number of cars that Adam must wash
= 5 + 1
= 6
(c)
Number of sets of $20
= 60 ÷ 20
= 3 (Note that there is no remainder.)
Total number of cars that Adam must wash
= 3 x 5
= 15
(d)
If Adam wants to earn $46, how many cars must he wash?
Number of sets of $46
= 46 ÷ 20
= 2 r 6
Number of cars in 5 sets
= 2 x 5
= 10
Number of extra cars that he has to wash
= 6 ÷ 3
= 2
Total number of cars
= 10 + 2
= 12
Answer(s): (a) $20; (b) 6; (c) 15; (d) 12