Divisibility rules for 2, 5 and 10

Key Notes :

Divisibility Rule for 2

  • A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8).
  • Example: 48 is divisible by 2 because the last digit is 8.

Divisibility Rule for 5

  • A number is divisible by 5 if its last digit is 0 or 5.
  • Example: 65 is divisible by 5 because the last digit is 5.

Divisibility Rule for 10

  • A number is divisible by 10 if its last digit is 0.
  • Example: 120 is divisible by 10 because the last digit is 0.

Why These Rules Are Useful

  • They help in quick division without actually dividing.
  • They make finding factors and multiples easier.
  • They help in checking answers in division problems.

Learn with an example

✈️ Is 24 divisible by 10?

  • yes
  • no
  • Try the “divisible by 10” rule on 24.
  • Look at the ones digit:
  • 24
  • The ones digit is 4.
  • The rule says that 24 is not divisible by 10.

✈️ Is 82 divisible by 5?

  • yes
  • no
  • Try the “divisible by 5” rule on 82.
  • Look at the ones digit:
  • 82
  • The ones digit is 2.
  • The rule says that 82 is not divisible by 5.

✈️ Is 90 divisible by 10?

  • yes
  • no
  • Try the “divisible by 10” rule on 90.
  • Look at the ones digit:
  • 90
  • The ones digit is 0.
  • The rule says that 90 is divisible by 10.

Let’s practice!🖊️