HCF & LCM MCQ SET 2
1. The LCM of 1/6 , 7/27 , 5/9 , 4/15 and 8/3 is:
(a) 280/3
(b) 3/280
(c) 280/15
(d) 15/280
Answer: A
2. Find the difference between the LCM and HCF of 4/7 , 5/14 and 9/35 .
(a) 19.5
(b) 20.7
(c) 22.3
(d) 25.7
Answer: D
3. If x is the HCF and y is the LCM of 3/5 , 6/25 , 9/20 , 27/50 then which one of the following is correct ?
(a) y = 90x
(b) y = 180x
(c) y = 270x
(d) y = 360x
Answer: D
4. Find the LCM of 3/2 , 81/16 and 9/8ย
(a) 111/2
(b) 91/2
(c) 81/2
(d) 101/2
Answer: C
5. Find the HCF of (3^45 – 1) and (3^35 – 1) ?
(a) 243
(b) 242
(c) 245
(d) 244
Answer: B
6. What is the largest number which divides both 2^35 – 1 and 2^91 – 1?
(a) 34
(b) 90
(c) 127
(d) 129
Answer: C
7. Find HCF of 4^63 + 1 and 4^45 + 1?
(a) 4^5 + 1
(b) 4^9 + 1
(c) 4^7 + 1
(d) 4^9 – 1
ย Answer: B
8. What is the HCF of 3^29 – 9 and 3^38 – 9?
(a) 3^9 – 1
(b) 3^11 – 1
(c) 3^11 – 3
(d) 3^11 – 9
Answer: D
9. Find the HCF of 3^3^333 + 1 and 3^3^333 + 1?
(a) 3^3^333 + 1
(b) 3^3^334 + 1
(c) 3^333 + 1
(d) 3^334 + 1
Answer: A
10. What is the HCF of the polynomials (x^4 – 1) , (x^3 – 3x^2 + 3x – 1) and (x^3 – 2x^2 + x) ?
(a) (x – 4)
(b) (x – 2)
(c) (x – 8)
(d) (x – 1)
Answer: D
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