HCF & LCM MCQ Set 2

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

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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

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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

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Answer: D

4. Find the LCM of 3/2 , 81/16 and 9/8 

(a) 111/2

(b) 91/2

(c) 81/2

(d) 101/2

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Answer: C

5. Find the HCF of (3^45 – 1) and (3^35 – 1) ?

(a) 243

(b) 242

(c) 245

(d) 244

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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

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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

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 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

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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

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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)

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Answer: D