Total number of 6-digit numbers in which only the digits 1,3,5,7 and 9 appear and each of these digit appears at least once, is :
The number of 4 letter words (with or without meaning ) that can be formed from the eleven letters of the word 'EXAMINATION' is _________,
If the number of five digit numbers with distinct digits and 2 at the 10th place is , then k is equal to :