Two n-digit integers (leading 0 allowed) are said to be equivalent if one is a permutation of the other. Thus 10075 and 01057 are equivalent.Find the number of 5-digit integers such that no two are equivalent.

Find the number of odd positive three digit integers.

Find the number of odd positive three digit integers.

Find the number of all positive integers of 3 digits which are divisibleby 5.

Two rational numbers are said to be equivalent or equal, if they have the same ______ form.

Find two equivalent ration numbers for 14/9

Give examples of two relations such that one is an equivalence relation and the other is not.

Let n denote the number of all n-digit positive integers formed by the digits 0, 1 or both such that no consecutive digits in them are 0. Let b_n = the number of such n-digit integers ending with digit 1 and c_n = the number of such n-digit integers ending with digit 0. The value of b_6 , is