Four digit numbers are formed by using the digits 1, 2, 3, 5 without repetition of digits. How many of them are divisible by 4?

What is the sum of all four digit numbers formed by using all digits 0, 1, 4, 5 without repetition of digits ?

How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated?

How many numbers lying between 100 and 1000 can be formed with digits 0,1,2,3,4,5 if repetition is not allowed?

How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?

How many four-digit natural numbers are there such that all of the digits are even ?