JEE Main Mathematics question
Let and be the sets of all positive divisors of 400 and 1000 respectively (including 1 and the number). Then, is equal to
Answer: (D)
Solution
is the set of common divisors, i.e. divisors of . Number of divisors .
Let and be the sets of all positive divisors of 400 and 1000 respectively (including 1 and the number). Then, is equal to
is the set of common divisors, i.e. divisors of . Number of divisors .