Adam earns $4 for every car he washes.
He gets $3 bonus for every 5 cars he washes.
- How much will Adam earn if he washes every 5 cars?
- If Adam wants to earn $27, how many cars must he wash?
- If Adam wants to earn $46, how many cars must he wash?
- If Adam wants to earn $81, how many cars must he wash?
(a)
Amount that Adam will earn for washing every 5 cars
= 4 x 5 + 3
= $23
(b)
Number of sets of $23
= 27 ÷ 23
= 1 r 4
Number of cars in 1 set
= 1 x 5
= 5
Number of extra cars that he has to wash
= 4 ÷ 4
= 1
Total number of cars that Adam must wash
= 5 + 1
= 6
(c)
Number of sets of $23
= 46 ÷ 23
= 2 (Note that there is no remainder.)
Total number of cars that Adam must wash
= 2 x 5
= 10
(d)
If Adam wants to earn $81, how many cars must he wash?
Number of sets of $81
= 81 ÷ 23
= 3 r 12
Number of cars in 5 sets
= 3 x 5
= 15
Number of extra cars that he has to wash
= 12 ÷ 4
= 3
Total number of cars
= 15 + 3
= 18
Answer(s): (a) $23; (b) 6; (c) 10; (d) 18