Quiz on Math Set 285

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Quiz on Math Set 285 :

Question 1 :

If there number are 2a, 5a, and 7a, what will be their LCM?
A. 70a
B. 65a
C. 75a
D. 70a^3

Correct Ans: Option A

Question 2 :

What will be the HCF of ( 2 x 3 x 7 x 9 ), ( 2 x 3 x 9 x 11 ) and ( 2 x 3 x 4 x 5 )?
A. 2 x 3 x 7
B. 2 x 3 x 9
C. 2 x 3
D. 2 x 7 x 9 x 11

Correct Ans: Option C

Question 3 :

Find the LCM of 1/3, 2/9, 5/6 and 4/27.
A. 1/54
B. 10/27
C. 20/3
D. 3/20

Correct Ans: Option C

Question 4 :

Find the LCM of 2/3, 3/5, 4/7 and 9/13.
A. 36
B. 1/36
C. 1/1365
D. 12/455

Correct Ans: Option A

Question 5 :

The product of HCF and LCM of 18 and 15 is 
A. 120
B. 150
C. 175
D. 270

Correct Ans: Option D

Question 6 :

The HCF of two numbers is 15 and their LCM is 225. If one of the numbers is 75, then find the another number.
A. 105
B. 90
C. 60
D. 45

Correct Ans: Option D

Question 7 :

The HCF of three numbers is 23. If they are in the ratio of 1 : 2 : 3, then find the numbers ?
A. 69, 15, 22
B. 23, 46, 69
C. 25, 31, 41
D. 23, 21, 35

Correct Ans: Option B

Question 8 :

The HCF and LCM of two numbers m and n are respectively 6 and 210. If m + n = 72, then 1/m + 1/n is equal to
A. 1/35
B. 3/35
C. 5/37
D. 2/35

Correct Ans: Option D

Question 9 :

The ratio of two numbers is 5 : 6 and their LCM is 480, then their HCF is 
A. 20
B. 16
C. 6
D. 5

Correct Ans: Option B

Question 10 :

If a number is exactly divisible by 11 and 13, which of the following types the number must be? 
A. Divisible by (11 + 13)
B. Divisible by (13 - 11)
C. Divisible by (11 x 13)
D. Divisible by (13 ÷ 11)

Correct Ans: Option C

Quiz Summary


Here the correct answers of every question in this quiz.

Q.1 [A],     Q.2 [C],     Q.3 [C],     Q.4 [A],     Q.5 [D],     Q.6 [D],     Q.7 [B],     Q.8 [D],     Q.9 [B],     Q.10 [C],    


Total Questions: 10
Your score:
Subject: Math
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