How many two digit numbers of distinct digits can be formed by using digits 3, 4, 5, 6 and 7 such that the numbers are divisible by 9?
Choose the most appropriate option:
A) 1  B) 2  C) 3  D) 4  E) 6
CONCEPT: A number will be divisible by 9 if sum of all the digits of the number is divisible by 9   Here the Possible sum of the two distinct digits can be 9 only in order to satisfy the given condition   If sum of Digits = 9, No. = 36, 45, 54, 63 --- 4 Cases   Answer: option 4
<result>D</result>
How many two digit numbers of distinct digits can be formed by using digits 3, 4, 5, 6 and 7 such that the numbers are divisible by 9?