A number is divisible by '3' if sum of its digits be divisible by 3. Here, Given number is 4252746 B Sum of its digits = 4 + 2+ 5 + 2 + 7 + 4 + 6 + B = 30 + B. For, B = 0, 3, 6, 9; Sum of digits will be divisible by '3'. Hence, number of values of B = 4.