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Elementary Mathematics

Elementary Mathematics Topics

School level (Class 6–12) — Elementary Mathematics

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quiz Questions

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Q41

Find the LCM of 84 and 29.

1 · 2 marks · MCQ

A.

113

B.

2436

C.

2444

D.

1

Explanation

LCM(84,29) = (84×29)/HCF = 2436.

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Q42

Find the HCF (GCD) of 21 and 35.

2 · 2 marks · MCQ

A.

14

B.

105

C.

7

D.

9

Explanation

HCF(21,35) = 7 using prime factorisation / Euclid's algorithm.

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Q43

Find the LCM of 51 and 111.

3 · 2 marks · MCQ

A.

162

B.

1887

C.

1895

D.

3

Explanation

LCM(51,111) = (51×111)/HCF = 1887.

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Q44

Find the HCF (GCD) of 98 and 41.

4 · 2 marks · MCQ

A.

1

B.

57

C.

4018

D.

9

Explanation

HCF(98,41) = 1 using prime factorisation / Euclid's algorithm.

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Q45

Find the LCM of 31 and 60.

5 · 2 marks · MCQ

A.

91

B.

1866

C.

1860

D.

1

Explanation

LCM(31,60) = (31×60)/HCF = 1860.

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Q46

Find the HCF (GCD) of 21 and 118.

1 · 2 marks · MCQ

A.

9

B.

97

C.

2478

D.

1

Explanation

HCF(21,118) = 1 using prime factorisation / Euclid's algorithm.

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Q47

Find the LCM of 38 and 118.

2 · 2 marks · MCQ

A.

2

B.

156

C.

2242

D.

2246

Explanation

LCM(38,118) = (38×118)/HCF = 2242.

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Q48

Find the HCF (GCD) of 22 and 41.

3 · 2 marks · MCQ

A.

902

B.

19

C.

8

D.

1

Explanation

HCF(22,41) = 1 using prime factorisation / Euclid's algorithm.

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Q49

Find the LCM of 75 and 27.

4 · 2 marks · MCQ

A.

690

B.

675

C.

3

D.

102

Explanation

LCM(75,27) = (75×27)/HCF = 675.

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Q50

Find the HCF (GCD) of 43 and 26.

5 · 2 marks · MCQ

A.

1

B.

4

C.

17

D.

1118

Explanation

HCF(43,26) = 1 using prime factorisation / Euclid's algorithm.