# Least Common Multiple of 2 Numbers Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to **Least Common Multiple of 2 Numbers**. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using **Show Answer** button. You can use **Next Quiz** button to check new set of questions in the quiz.

Q 1 - Find the least common multiple (l. c. m.) of following pair of numbers.

18, 24

### Answer : C

### Explanation

**Step 1:**

The multiples of 18 and 24 are as follows

18, 36, 54, **72**…

24, 48, **72**…

**Step 2:**

The lcm of 18 and 24 is therefore 72

Q 2 - Find the least common multiple (l. c. m.) of following pair of numbers.

15, 27

### Answer : A

### Explanation

**Step 1:**

The multiples of 15 and 27 are as follows

15, 30, 45, 60, 75, 90, 105, 120, **135**…

27, 54, 81, 108, **135**…

**Step 2:**

The lcm of 15 and 27 is therefore 135

Q 3 - Find the least common multiple (l. c. m.) of following pair of numbers.

21, 30

### Answer : B

### Explanation

**Step 1:**

The multiples of 21 and 30 are as follows

21, 42, 63, 84, 105, 126, 147, 168, 189, **210**…

30, 60, 90, 120, 150, 180, **210**…

**Step 2:**

The lcm of 21 and 30 is therefore 210

Q 4 - Find the least common multiple (l. c. m.) of following pair of numbers.

16, 36

### Answer : D

### Explanation

**Step 1:**

The multiples of 16 and 36 are as follows

16, 32, 48, 64, 80, 96, 112, 128, **144**…

36, 72, 108, **144**…

**Step 2:**

The lcm of 16 and 36 is therefore 144.

Q 5 - Find the least common multiple (l. c. m.) of following pair of numbers.

16, 48

### Answer : D

### Explanation

**Step 1:**

The multiples of 16 and 48 are

16, 32, **48**…

**48**, 96...

**Step 2:**

So the lcm of 16 and 48 is 48 itself.

Q 6 - Find the least common multiple (l. c. m.) of following pair of numbers.

24, 30

### Answer : C

### Explanation

**Step 1:**

The multiples of 24 and 30 are

24, 48, 72, 96, **120**…

30, 60, 90, **120**…

**Step 2:**

So the lcm of 24 and 30 is therefore 120.

Q 7 - Find the least common multiple (l. c. m.) of following pair of numbers.

15, 25

### Answer : B

### Explanation

**Step 1:**

The multiples of 15 and 25 are as follows

15, 30, 45, 60, **75**…

25, 50, **75**…

**Step 2:**

The lcm of 15 and 25 is therefore 75.

Q 8 - Find the least common multiple (l. c. m.) of following pair of numbers.

30, 45

### Answer : A

### Explanation

**Step 1:**

The multiples of 30 and 45 are as follows

30.60, **90**…

45, **90**…

**Step 2:**

So the lcm of 30 and 45 is 90.

Q 9 - Find the least common multiple (l. c. m.) of following pair of numbers.

48, 60

### Answer : D

### Explanation

**Step 1:**

The multiples of 48 and 60 are as follows

48, 96, 144, 192, **240**…

60, 120, 180, **240**…

**Step 2:**

The lcm of 48 and 60 is therefore 240.

Q 10 - Find the least common multiple (l. c. m.) of following pair of numbers.

20, 26

### Answer : C

### Explanation

**Step 1:**

The multiples of 20 and 26 are

20, 40, 60, 80, 100, 120, **140**…

28, 56, 84, 112, **140**…

**Step 2:**

The lcm of 20 and 26 is therefore 140.