1.

let S ={1,2,3,…,24}. Define a relation '~' on S as x ~y is the product of the digits in x is same as that of the digits of y. (Note that is x is a single digit number then the product of the digits in x will be considered to be x.) Then the number of equivalence classes for this equivlence relation is

Answer»

9
10
20
24

Answer :B


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