For what value of m will the system of equations 17x+my+102=0 and 23x+299y+138=0 have infinite number of solutions? 

How many three-digit numbers are there in which all the digits are odd? 

What is the sum of all natural numbers between 100 and 400 which are divisible by 13? 

The difference of a number consisting of two digits from the number formed by inter changing the digits is always divisible by: 

The greatest number less than 1500, which is divisible by both 16 and 18, is:

The number of integers in between 100 and 600, which are divisible by 4 and 6 both, is: 

What least value which should be added to 1812 to make it divisible 7,11 and 14? 

If an 8-digit number 1862383A is divisible by 22, find the value of A.