MEDIUM
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What is the HCF of and ?
(a)
(b)
(c)
(d)

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Important Questions on Less Common Multiple and Highest Common Factor
EASY
Find the ratio of the LCM and the HCF of 5, 25 and 30.
(A) 1 : 6
(B) 30 : 1
(C) 1 : 30
(D) 6 : 1

EASY
A, B, C have and marbles, respectively. They decide to divide these marbles in parts such that all parts have the same number of marbles. Also, they cannot give or take the marbles. Find the minimum possible number of parts that can be made.

EASY
Find the HCF of 3, 7 and 15.
(A) 7
(B) 15
(C) 3
(D) 1

EASY
What will be the HCF of and ?

EASY
What will be the Highest Common Factor of and

EASY
The LCM and HCF of two numbers are and respectively. If one of the numbers is then what is the second number?

EASY
Find the number lying between and which when divided by and leaves in each case a remainder .

EASY
At a telephone exchange, three phones ring at intervals of sec, sec, and sec. If they ring together at am, when will they next ring together?

EASY
What is the Lowest Common Multiple of and ?

EASY
What is the value of half of the HCF of and ?

MEDIUM
Find the number lying between and , which when divided by and leaves in each case a reminder .

MEDIUM
is the highest common factor of '' and ''. '' and '' are integers and . What would be the minimum values of ?

MEDIUM
Let be positive integers such that and Which of the following statements are true?
divides or divides
divides or divides
divides

EASY
If is a prime number, of and its successive number would be:

EASY
The LCM of two numbers is . If their HCF is and one of the numbers is , find the other number:

EASY
Find the G.C.F and L.C.M of and .
1.
2.
3.
4.

HARD
Let , where and are positive integers. Suppose . If the coefficient of the highest degree term of is , the sum of the roots of is -

