Common Division Method for L.C.M

Q. The smallest 3-digit number which is completely divisible by 18, 24 and 32 is

1. $13824$
2. $288$
3. $432$
4. $576$

Q.

Question 5

Write the smallest 5-digit number and express it in terms of its prime factors.

Q. Find the LCM of 84 and 96.

Q.

Find the smallest number which when divided by $18,12$and $24$ leaves remainder $16,10$and $22$ respectively.

Q. What is the smallest number which when decreased by 7 is exactly divisible by 12, 16, 18, 21 and 28?

1. 1015
2. 1012
3. 1022
4. 1008

Q. Find the LCM of 25, 50 and 100.

1. 25

2. 50

3. 75

4. 100

Q. The least number which is exactly divisible by 6, 12, 24 is ___.

1. 24
2. 12
3. 6
4. 1

Q. Find the LCM of 25, 50 and 100.

1. 25
2. 50
3. 100
4. 75

Q.

Find HCF of the following fractions

$\frac{3}{2}$, $\frac{5}{4}$.

1. $\frac{1}{3}$

2. $\frac{1}{4}$

3. $\frac{1}{6}$

4. $\frac{1}{2}$

Q.

Find the LCM of the following by division method

$8,12,20,30,80$

Q. The L.C.M of 50 and 75 is .

1. 25
2. 75
3. 175
4. 150

Q.

Find the LCM of $20$ and $30$.

Q.

Find the LCM of the following by division method

$20,25,30,50$

Q.

If $D_{30}$ is the set of the divisors of $30$, $x,y\in D_{30}$, we define $x+y=LCM(x,y),x·y=GCD(x,y),x=\frac{30}{x}$ and $f(x,y,z)=(x+y)\times (y+z)$, then $f(2,5,15)$ is equal to

1. $2$

2. $5$

3. $10$

4. $15$

Q. The LCM of $2,4$ and $7$ is

1. $4$
2. $2$
3. $7$
4. $56$
5. $28$

Q. The LCM of $2,4$ and $7$ is

1. $28$
2. $2$
3. $4$
4. $7$
5. $56$

Q. Find LCM:
$36$ and $54$.

Q. Solve: $\frac{3}{10}+\frac{7}{15}$

Q. LCM of the numbers 40, 48 and 90 is

1. 720
2. 360
3. 520
4. 640

Q. The L.C.M of 50 and 75 is .

1. 25
2. 75
3. 175
4. 150

Q.

Samaira heard 3 bells toll together at 10:00 AM. The first bell tolls after every 5 second, the second tolls after every 9 seconds and the third tolls after every 10 seconds. When will they toll together again?

1. After 45 seconds
2. After 90 seconds
3. After 2 minutes and 30 seconds
4. After 3 minutes

Q. The L.C.M of 50 and 75 is .

1. 75
2. 25
3. 150
4. 175

Q. The L.C.M of 50 and 75 is .

1. 75
2. 25
3. 175
4. 150

Q. The L.C.M of 50 and 75 is .

1. 25
2. 175
3. 150
4. 75

Q. 23.657802 23.657082

1. $<$
2. $>$
3. $=$

Q. What is the LCM of $8$ and $12$?

1. $8$
2. $12$
3. $96$
4. $24$

Q.

Manu goes dance class once every 6 days, karate class once in every 12 days and art class once in every 18 days. She attended all the three classes on 1st April. On which day, will she attend all the 3 classes again?

Q.

Samaira heard 3 bells toll together at 10:00 AM. The first bell tolls after 5 second, the second tolls after 9 seconds and the third tolls after 10 seconds. When will they toll together again?

1. After 90 seconds
2. After 2 minutes and 30 seconds
3. After 3 minutes
4. After 45 seconds

Q. The L.C.M of 50 and 75 is .

1. 25
2. 150
3. 175
4. 75