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Quantitative Ability Topics

Postgraduate level — Quantitative Ability

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quiz Questions

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Q21

Find the LCM of 17 and 90.

1 · 2 marks · MCQ

A.

107

B.

1

C.

1530

D.

1537

Explanation

LCM(17,90) = (17×90)/HCF = 1530.

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Q22

Find the HCF (GCD) of 66 and 41.

2 · 2 marks · MCQ

A.

2706

B.

1

C.

6

D.

25

Explanation

HCF(66,41) = 1 using prime factorisation / Euclid's algorithm.

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Q23

Find the LCM of 74 and 52.

3 · 2 marks · MCQ

A.

1924

B.

1934

C.

2

D.

126

Explanation

LCM(74,52) = (74×52)/HCF = 1924.

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Q24

Find the HCF (GCD) of 119 and 55.

4 · 2 marks · MCQ

A.

6

B.

64

C.

1

D.

6545

Explanation

HCF(119,55) = 1 using prime factorisation / Euclid's algorithm.

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Q25

Find the LCM of 73 and 111.

5 · 2 marks · MCQ

A.

1

B.

8118

C.

8103

D.

184

Explanation

LCM(73,111) = (73×111)/HCF = 8103.

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Q26

Find the HCF (GCD) of 19 and 41.

1 · 2 marks · MCQ

A.

9

B.

779

C.

22

D.

1

Explanation

HCF(19,41) = 1 using prime factorisation / Euclid's algorithm.

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Q27

Find the LCM of 63 and 97.

2 · 2 marks · MCQ

A.

6111

B.

6123

C.

160

D.

1

Explanation

LCM(63,97) = (63×97)/HCF = 6111.

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Q28

Find the HCF (GCD) of 81 and 105.

3 · 2 marks · MCQ

A.

3

B.

2835

C.

6

D.

24

Explanation

HCF(81,105) = 3 using prime factorisation / Euclid's algorithm.

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Q29

Find the LCM of 55 and 95.

4 · 2 marks · MCQ

A.

1045

B.

5

C.

1058

D.

150

Explanation

LCM(55,95) = (55×95)/HCF = 1045.

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Q30

Find the HCF (GCD) of 21 and 54.

5 · 2 marks · MCQ

A.

378

B.

3

C.

33

D.

10

Explanation

HCF(21,54) = 3 using prime factorisation / Euclid's algorithm.