Lesson eLearning

A clock is set up so that every 5th tick it is silent. If the first 30 ticks are observed, how many silent ticks occurred?

hard 3 marks Class 4 · Mathematics · Tick Tick Tick
Answer
6

The correct answer is 6 — State the number of silent ticks: .

Step-by-step solution

  1. Recognize that silent ticks happen at multiples of 5.
  2. List the multiples of 5 up to 30: 5, 10, 15, 20, 25, 30.
  3. Count these multiples: there are 6.
  4. State the number of silent ticks: .
Common mistake: Counting every 5 ticks as silent instead of only the 5th

Concept tested: Counting multiples

Published · How this solution was prepared and checked

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