87,342 divisible by 3 or 4 or both?are they divisible by 12 also
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Divisibility rule of 12 : Number divisible by both 3 and 4.
⇒ Divisibility rule of 3 : A number is divisible by 3 if the sum of the digits is divisible by 3.
⇒ Divisibility rule of 4 : A number is divisible by 4, if the last two digits are a multiple of 4.
⇒ 123452=1+2+3+4+5+2=17
.⇒ 78968=7+8+9+6+8=28
⇒ 123452 and 78968 are not divisible by 3 so its not divisible by 12
⇒ 79998=7+9+9+9+8=42, it is divisible by 3.
⇒ Last two digit 98 is not divisible by 4
∴ 79998 is not divisible by 12.
⇒ 79968=7+9+9+6+8=39, it is divisible by 3
⇒ Last two digit 68 are divisible by 4.
∴ 79968 is divisible by 12.
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