When a certain number is multiplied by 18, the product consists entirely of 2’s. What is the minimum number of 2’s. in the product?

When a certain number is multiplied by 13, the product consists entirely of fives.Find the smallest such number.

A certain number N when multiplied by 13, the resultant values consists entirely of sevens. The value of N is :

lf two irrational numbers are multiplied, then their product is:

If two irrational numbers are multiplied, then their product is :

What is the number which when multiplied by 20 gives the product 60?

What is the number which when multiplied by 20 gives the product 60?

A positive integer P ,when multiplied by 9 gives a result which consists of 5 followed by some number of 7 's. What is the number of 7 's in the product thus obtained , if P is the least such number possible ?