Question

suppose in the chapter arithemetic progessions a question comes " find the 3 digit numbers divisible by 6 " how can we know the first 3 digit number divisible by 6 , the next number divisible by 6 and the last number divisible by 6?

Answer 1

if the sum of your question is divisible by 3 then it is also divisible by 6 e.g. 3+5+6+7= 21 therefore 21 is divisible by 3 so it is also divisible by6