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WBCS Preliminary Examination 2020 — General Studies · Question 175 of 200

Q175
ArithmeticNumber System, LCM/HCF & Divisibility
The smallest composite number is
  1. a.1
  2. b.2
  3. c.4
  4. d.3

Answer: (C) 4

A composite number must have more than two factors; 1 isn't composite (or prime), and 2, 3 are prime, so 4 (factors 1, 2, 4) is the smallest composite number.

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