Tuesday, December 13, 2011

Divisibility Rules

Rule for 1:
  • All whole numbers are divisible by one
e.g:
3÷1=3
111
÷1=111

Rule for 2:
  • All even numbers are divisible by 2.
  • Even numbers end in 0, 2, 4, 6, and 8.
  • Odd numbers end in 1, 3, 5, 7, and 9.
Rule for 4:
  • All numbers that are divisible by 2 twice.
e.g:
16÷2=8÷2=4
16 is divisible by 4.

Rule for 8:
  • All whole numbers divisible by 2 thrice.
e.g:
24÷2=12÷2=6÷2=3
24 is divisible by 8.

Rule for 5:
  • All numbers ending in 5 or 0.
e.g: 5,10,15,20........


Rule for 10:
Any whole numbers ending in 0.

e.g: 10,20,30,40............

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