First Prime Number

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 prime number is

  1. 5
  2. 7
  3. 11
  4. 17
Monis Rasool Professor Asked on 8th June 2015 in Maths.
Add Comment
  • 1 Answer(s)

    Answer: (1) 5
    Explanation:-
    Let be the prime numbers are A, B, C  and  D
    According to the question,
    ABC = 385
    BCD = 1001
    ABC/BCD = 385/1001
    A/D = 5/13

    Hence, the first is 5.

    Anurag Mishra Professor Answered on 9th June 2015.
    Add Comment
  • Your Answer

    By posting your answer, you agree to the privacy policy and terms of service.