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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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Q1

Find the LCM of 50 and 47.

1 · 2 marks · MCQ

A.

1

B.

2364

C.

2350

D.

97

Explanation

LCM(50,47) = (50×47)/HCF = 2350.

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Q2

Find the HCF (GCD) of 57 and 52.

2 · 2 marks · MCQ

A.

2964

B.

9

C.

5

D.

1

Explanation

HCF(57,52) = 1 using prime factorisation / Euclid's algorithm.

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Q3

Find the LCM of 36 and 28.

3 · 2 marks · MCQ

A.

4

B.

252

C.

64

D.

257

Explanation

LCM(36,28) = (36×28)/HCF = 252.

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Q4

Find the HCF (GCD) of 34 and 89.

4 · 2 marks · MCQ

A.

1

B.

7

C.

3026

D.

55

Explanation

HCF(34,89) = 1 using prime factorisation / Euclid's algorithm.

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Q5

Find the LCM of 79 and 72.

5 · 2 marks · MCQ

A.

1

B.

5688

C.

5695

D.

151

Explanation

LCM(79,72) = (79×72)/HCF = 5688.

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Q6

Find the HCF (GCD) of 25 and 19.

1 · 2 marks · MCQ

A.

475

B.

6

C.

1

D.

214

Explanation

HCF(25,19) = 1 using prime factorisation / Euclid's algorithm.

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Q7

Find the LCM of 29 and 74.

2 · 2 marks · MCQ

A.

2154

B.

1

C.

103

D.

2146

Explanation

LCM(29,74) = (29×74)/HCF = 2146.

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Q8

Find the HCF (GCD) of 115 and 109.

3 · 2 marks · MCQ

A.

12535

B.

3

C.

1

D.

6

Explanation

HCF(115,109) = 1 using prime factorisation / Euclid's algorithm.

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Q9

Find the LCM of 50 and 23.

4 · 2 marks · MCQ

A.

1162

B.

73

C.

1

D.

1150

Explanation

LCM(50,23) = (50×23)/HCF = 1150.

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Q10

Find the HCF (GCD) of 59 and 102.

5 · 2 marks · MCQ

A.

4

B.

6018

C.

43

D.

1

Explanation

HCF(59,102) = 1 using prime factorisation / Euclid's algorithm.