Question

Using divisibility rules , find which of the following numbers are divisible by $2,5,10$ ( say yes or no ) in the given table . What do you observe?

Number	Divisible by $2$	Divisible by $5$	Divisible by $10$
$524$	YES	NO	NO
$1200$
$535$
$836$
$780$
$3500$
$4820$
$48630$

Answer 1

Number	Divisible by 2	Divisible by 5	Divisible by 10
524	YES	NO	NO
1200	YES	YES	YES
535	NO	YES	NO
836	YES	NO	NO
780	YES	YES	YES
3500	YES	YES	YES
4820	YES	YES	YES
48630	YES	YES	YES

If the number is divisible by $10$ then it is always divisible by $2,5$
So, we have to check divisibility of $535$ and $836$ exclusively.