Question

If '3849x' is a five digit number which is divisible by 91, then find the value of 'x'.

Q: Answer-If '3849x' is a five digit number which is divisible by 91, then find the value of 'x'.

Since, 91 13 X 7So, the number must be divisible by 7Divisibility by 7 If we make two groups each having three digits, taken from right to left and subtract the two groups and the resultant is divisible by 7, then the number if divisible by 7.So, 49x - 038 must be divisible by 7Only x 3 will satisfy the above condition as 493 - 38 455 which is divisible by 7So, x 3