LCM

Q.

Zero is neither a prime nor a composite number.Why?

Q.

Can we find LCM of following :

A) irrational and irrational

B) irrational and rational

Why or why not?

Q.

The H.C.F. of two numbers is $9$ and their L.C.M. is $108$. If the first number is $36$, find the second.

Q.

Question 38
LCM of two numbers is 180. Then which of the following is not the HCF of the numbers?

(A) 45
(B) 60
(C) 75
(D) 90

Q.

Find the smallest positive number which us exactly divisible by 1/3, 1/2, 3/7, and 4/7

Q.

If LCM of polynomials (y-3)^a (2y+1)^b (y+13)^7 and (y-3)^4 (2y+1)^9 (y.+13)^c is(y-3)^6 (2y+1)^10(y+13)^7, then the least value of a + b + c is?

Q.

Question 8

Find the least number which when divided by 6, 15 and 18 leave remainder 5 in each case.

Q.

The H.C.F. of two numbers is $29$ and their L.C.M. is $1160$. If one of the numbers is $145$, find the number.

Q.

The LCM of two co-prime numbers is $216$. If the square root of one number is $6$, what is the cube of the other number?

1. 6

2. 343

3. 36

4. 216

Q.

Question 88

In the following question, state whether the given statement is true (T) or false (F).
LCM of two numbers is 28 and their HCF is 8.

Q.

Question 97

In the following question, state whether the given statement is true (T) or false (F).

The LCM of two numbers is greater than the larger of the two numbers.

Q.

Question 89

In the following question, state whether the given statement is true (T) or false (F).
LCM of two or more numbers may be one of the numbers.

Q. A labourer earns $Rs1980$ in $12$ days.
How much does he earn in $7$ days?

Q.

If $3\mathrm{and}10$ are two co-prime numbers. Find their LCM.

Q. (iii) $\sqrt{2},\sqrt[3]{5}$

Q. (vii) $\sqrt[3]{6},\sqrt[4]{8}$

Q. in school it is told that for question number 6 which set of numbers will be the universal set for the set given below? A= to set of multiple of 5 Set B= to multiples of 7 and Set C= to multiples of 12 so can we write answer as real number, instead of natural numbers, integers, rational number, and whole number??