1-digit number

The licence plates for vehicles registered in Delhi consist of 3 letters (of English alphabet) followed by 1,2,3 or 4 digits. The letter on the extreme right has to be 'D'. For the 1-digit number plates, the number 0 is not allowed. For other, the digits and the letters, of course can repeat, but the numbers should be significant. Determine the possible number of licence plates.

Use the given digits (without repetition) and make the greatest and the smallest 4-digit numbers: 1, 3, 7, 5

The digit of a 2-digit number in a unit is 5 and the sum of the digits is the (1/5) of the original number Find the number.

1.The unit digit of a two-digit number is 3 and seven xx the sum of the digits is the number itself.Find the number.

The ratio of a 2-digit number to the sum of its digits is 7: 1. If the digit in the ten's place is 1 more than the digit in the one's place, then the number is

Find the number of 6-digit numbers that can be found using the digits 1, 2, 3, 4, 5, 6 once such that the 6-digit number is divisible by its unit digit. (The unit digit is not 1).

Statement-1: A 5-digit number divisible by 3 is to be formed using the digits 0,1,2,3,4,5 without repetition, then the total number of ways this can be done is 216. Statement-2: A number is divisible by 3, if sum of its digits is divisible by 3.

The number of 5-digit number that can be made using the digits 1 and 2 and in which at laest one digits is different, is