Question

Question 27
The number of distinct prime factors of the largest 4-digit number is

(A) 2
(B) 3
(C) 5
(D) 11

Answer 1

We know that, largest 4-digit number = 9999
Prime factorisation of 9999:


i.e. $9999=3^2\times 11\times 101$
Hence, the number of distinct prime factors of the largest 4-digit number is 3 (3,11 and 101)