Factors I - Challenging

Question 1: What is LCM (the Least Common Multiple) of

25

and

105

?

A

1050

B

525

C

250

D

2625

Question 2: What is LCM of

14

and

196

?

A

1372

B

196

C

2744

D

392

Question 3: What is LCM of

12, 15

A

60

B

75

C

90

D

72

Question 4: Write

108

as a product of prime numbers

A

2 \cdot 2 \cdot 3 \cdot 3 \cdot 5

B

27 \cdot 4

C

2 \cdot 2 \cdot 3 \cdot 3 \cdot 3

D

11 \cdot 11

Question 5: Write

99

as a product of prime numbers

A

3 \cdot 3 \cdot 3 \cdot 2 \cdot 2

B

3 \cdot 3 \cdot 11

C

2 \cdot 3 \cdot 3 \cdot 3 \cdot 3

D

2 \cdot 2 \cdot 3 \cdot 11

Question 6: Write

186

as a product of prime numbers

A

2 \cdot 2 \cdot 3 \cdot 3 \cdot 11

B

2 \cdot 3 \cdot 31

C

3 \cdot 3 \cdot 3 \cdot 3 \cdot 5

D

2 \cdot 3 \cdot 3 \cdot 5 \cdot 11

Question 7: What is HCF (the Highest Common Factor) of

116, 24

?

A

2

B

12

C

1

D

4

Question 8: What is HCF of

425

and

952

?

A

1

B

85

C

68

D

17

Question 9: What is HCF of

320

and

860

?

A

20

B

320

C

40

D

32

Question 10: Solve:

2^{5} \cdot 3^{2} \cdot 5 \cdot 7

A

10800

B

2520

C

5040

D

10080

Test: Factors I - Challenging

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