Divisibility by 2, 5, 3

2 and 5: look at the last digit; 3: check the digit sum

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About This Practice

Quick tests for 2, 5 and 3: for 2 and 5 just read the last digit (0, 2, 4, 6, 8 for 2; 0 or 5 for 5), while 3 needs the sum of all digits. A number appears — switch on the lamps for your calls, then confirm to see the answers and the evidence.

A number appears — switch on the lamps you believe mark it as a multiple of 2, 5 and 3, then confirm. After a correct answer the evidence shows: last digit for 2 and 5, digit sum for 3.

MediumEstimated Time: 10minmultiples of 2multiples of 5multiples of 3divisibility test

How to Play

  1. Look at the last digit: is it 0, 2, 4, 6 or 8? Then it is a multiple of 2.
  2. Check for 0 or 5: that makes it a multiple of 5.
  3. Add all the digits: is the sum a multiple of 3?
  4. Switch on the lamps for your judgments and tap confirm.
  5. Read the evidence after a correct answer — or find which rule you misused.

Learning Objectives

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