Exercise
1B
BASIC LEVEL
1. Find the highest common factor of each of
the following sets of numbers.
(a) 12 and 30 (b) 84 and 156
(c) 15, 60 and 75 (d) 77, 91 and 143
Answers
Answered by
2
Answer:
answer is (b) 84and156
Answered by
2
Answer:
Option B is correct
Explanation:
(a) 12 and 30
12 = 2×2×3
30 = 2×3×5
HCF = 2×2×3×5
HCF = 60
(b) 84 and 156
84 = 2×2×3×7
156 = 2×2×3×13
HCF = 2×2×3×7×13
HCF = 1092
(c) 15, 60 and 75
15 = 3×5
60 = 2×2×3×5
75 = 3×5×5
HCF = 2×2×3×5×5
HCF = 300
(d) 77, 91 and 143
77 =7×11
91 = 7×13
143 = 11×13
HCF = 7×11×13
HCF = 1001
so, the highest common factor of each of the sets of numbers is (b) 84 and 156 = 1092
hope it helps you :)
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