GCD and LCM using Recursion Multiple choice Questions and Answers (MCQs)

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GCD and LCM using Recursion Multiple choice Questions and Answers (MCQs)

Question 6 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In terms of Venn Diagram, which of the following expression gives LCM (Given A ꓵ B ≠ Ø)?
A
Multiplication of A U B terms
B
Multiplication of A ꓵ B terms
C
Multiplication of A*B terms
D
Multiplication of A-B terms
Question 6 Explanation: 
In terms of Venn Diagram, the LCM is given by the Union of two sets. So A U B gives the LCM. While A ꓵ B gives the GCD.

Question 7 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the LCM according to the given Venn Diagram?
A
2
B
3
C
180
D
6
Question 7 Explanation: 
In terms of Venn Diagram, the LCM is given by the Union of two sets. So A U B gives the LCM. So product of all the terms is 180.

Question 8 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the lcm (a, b)?
A
a + b
B
gcd (a-b, b) if a>b
C
lcm (b, a)
D
a - b
Question 8 Explanation: 
Since the LCM function is commutative, so lcm (a, b) = lcm (b, a).

Question 9 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the LCM of 48, 18, 6?
A
122
B
12*2
C
3
D
6
Question 9 Explanation: 
The LCM of 48, 18, 6 is 144 and 122 is 144.

Question 10 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Is 9 and 28 coprime number.
A
True
B
False
Question 10 Explanation: 
Coprime numbers have GCD 1 and LCM is the product of the two given terms. So 9 and 28 are coprime numbers.

There are 10 questions to complete.