How many four digits numbers can be formed by using `1,2,...7` which are greater than 3400?

. How many four digits number can be formed by using 1,2,....7

How many four digit numbers can be formed with the digits 3,5,7,8,9 which are greater than 7000, if repetition digits is not allowed?

How many four digit numbers can be formed with the digits 3,5,7,8,9 which are greater than 8000, if repetition of digits is not allowed?

How many 10 -digit numbers can be formed by using digits 1 and 2

How many numbers can be formed with the digits 2,4,4,3,7 which are greater than 40000?

How many four-digit numbers can be formed by using the digits 1,2,3,4,5,6,7 if at least one digit is repeated.

How many 5-digit numbers can be formed by using the digits 0, 1 and 2?

How many four digit numbers can be formed using digits 1, 2, 3, 4, 5 such that at least one of the number is respeated?