In a car park, there are 46 lorries and motorcycles. If there are 144 wheels altogether, how many motorcycles are there?
Number of
lorries |
Wheels of
lorries |
Number of
motorcycles |
Wheels of
motorcycles |
Total
wheels |
| 46 |
46 x 4 = 184 |
0 |
0 |
184 |
| 45 |
45 x 4 = 180 |
1 |
1 x 2 = 2 |
182 |
| 26 |
26 x 4 = 104 |
20 |
20 x 2 = 40 |
144 |
Total number of wheels if all the vehicles are lorries
= 46 x 4
= 184
Big difference between the number of wheels between the lorries and the motorcycles
= 184 - 144
= 40
Small difference between the number of wheels between a lorry and a motorcycle
= 4 - 2
= 2
Number of motorcycles
= 40 ÷ 2
= 20
Answer(s): 20
