The sum of 2 digits x and y is divisible by 7. What can one say about a 3 digit number formed by these two digits

If the sum of the digits of a number is divisible by 3 then it is divisible by ________

Find the number of 4 digit numbers divisible by 5 that can be formed using the digits 1, 2, 3, 4, 5 when repetition of digits is allowed.

Given below are two pairs of statements. Combine these two statements using if and only if. p: If the sum of digits of a number is divisible by 3, then the number is divisible by 3. q:If a number is divisible by 3, then the sum of its digits is divisible by 3.

Given below are two pairs of statements. Combine these two statements using if and only if : p : If the sum of digits of a number is divisible by 3, then the number is divisible by 3. q : If a number is divisible by 3, then the sum of its digits is divisible by 3.

Can you arrange the digits 1, 2, 3, 4, 5, 6, 7, 8, 9 in an order so that the number formed by first two digits is divisible by 2, the umber formed by first three digits is divisible by 3, the number formed by first four digits is divisible by 4 and so on upto nine digits?

The number of four digited which are not divisible by 2 that can be formed from the digits 2,3,4,5,6 is

The sum of digits of a two digit number is 8 and the difference between the number and that formed by reversing the digits is 18. What is the difference between the digits of the number