Problem: 200 children came to the park last Sunday. All of the older children rode bicycles into the park and all of the younger children came on tricycles. 480 Wheels rode into the park that day, all of them functioning on the children’s bicycles of tricycles. How many younger children came to the park last Sunday?

Correct Answer: 80

Explanation:

Let, Number of older children = x

Number of younger children = (200 – x)

x x 2 + 3(200 —x) = 480

2x+600—3x=480

x = 120

Number of younger children = (200 — 120) = 80