A `2n` digit number starts with `2` and all its digits are prime, then the probability that the sum of all `2` consecutive digits of the number is prime is

Sum of last three digits of the number N=7^(100)-3^(100) is.

How many 4-digit numbers are there with no digit repeated?

A two digit number is formed with digits 2,3,5,7,9, without repetition. What is the probability that the number formed is an odd number?

A two digit number is formed with digits 2,3,5,7,9, without repetition. What is the probability that the number formed is a multiple of 5?

A two digit number is formed with the digits , 2,5,9 ( repetition is allowed ) . Find the probability that the number is divisible by 2.

A two digit number is formed with the digits 2,5,9 (repetition is allowed). Find the probability that the number is divisible by 2 or 5 .

A three-digit number is selected at random from the set of all three-digit numbers. The probability that the number selected has all the three digits same is 1//9 b. 1//10 c. 1//50 d. 1//100

A five-digit number is formed by the digit 1, 2, 3, 4, 5 without repetition. Find the probability that the number formed is divisible by 4.

A two digit number is to be formed from the digits 0,1,2,3,4. Repetition of the digit is allowed . Find the probability that the number so formed is a - prime number

The number of five digit numbers in which all digits are even, is :