RRB NTPC · Question 64
Find the HCF of 27, 18, 45, 81. A. 9 B. 6 C. 3 D. 18
Show answer & explanation
Answer: (A) A
Explanation
27 = 3³, 18 = 2 × 3², 45 = 3² × 5 and 81 = 3⁴. The common factor is 3² = 9.
Railways PYQCBT 1 2016
RRB NTPC · Question 64
Answer: (A) A
27 = 3³, 18 = 2 × 3², 45 = 3² × 5 and 81 = 3⁴. The common factor is 3² = 9.