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There are 15 bicycles and some carts. Together the total number of wheels is 90. How many carts are there?

medium MCQ 2 marks Class 4 · Mathematics · Carts and Wheels
  1. 10
  2. 15
  3. 20
  4. 25
Answer
15

The correct answer is 15 — 4. Solve 4x = 60 → x = 15.

Step-by-step solution

  1. 1. Each bicycle has 2 wheels; 15 bicycles contribute 15×2=30 wheels.
  2. 2. Let x be number of carts; each cart has 4 wheels, so cart wheels = 4x.
  3. 3. Total wheels: 4x + 30 = 90.
  4. 4. Solve 4x = 60 → x = 15.
Common mistake: Not multiplying the number of bicycles by 2

Concept tested: Basic equation solving

Published · How this solution was prepared and checked

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