Take a four digit general number, make the divisibility rule for '7'.

The number of four digit telephone numbers formed by the digits is (Note: 0 can be accepted in the first place)

The number of four digited numbers which are not divisible by 5 that can be formed by using all the digits 0,2,4,5 is

How many three digit numbers are divisible by 3?

Find the sum of all three digit natural numbers, which are divisible by 3 and not divisible by 6.

Take a three digit number and make the new numbers by replacing its digits as (ABC, BCA, CAB). Now add these three numbers. For what numbers the sum of these three numbers is divisible?

Take a two digit number reverse the digits and get another number. Subtract smaller number from bigger number. Is, the difference of those two numbers is always divisible by 9?

How many two-digit numbers are divisible by 3?

How many two digit numbers are divisible by 4 ?

Take any three digit number and write it two times to make a 6-digit number.Verify whether it is divisible by both 7 and 11.

Identify the number of 3 digit number that divisible by 7.