Question 54

There are four prime numbers written in ascending order. The product of the first three is 385 and that of the last three is 1001. The first number is

Solution

Prime factorization of :

385 = $$5\times7\times11$$

1001 = $$7\times11\times13$$

Thus, the 4 prime numbers are : 5,7,11,13

=> Smallest one = 5

=> Ans - (A)

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