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Aptitude - Problems on H.C.F and L.C.M - Discussion

Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 30)
Problems on H.C.F and L.C.M
30.
If the sum of two numbers is 55 and the H.C.F. and L.C.M. of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to:
55
601
601
55
11
120
120
11
Answer: Option
Explanation:

Let the numbers be a and b.

Then, a + b = 55 and ab = 5 x 120 = 600.

The required sum = 1 + 1 = a + b = 55 = 11
a b ab 600 120

Discussion:
37 comments Page 2 of 4.
Nirmala said:   9 years ago
Find the sum 7/16 + 5/24.

Give me the answer with the proper explanation.
M veeresh said:   9 years ago
@Anisa.

The Lcm of 2 numbers is 729. Find lcm to 729 it will be 81 then 81 * x = 729.

i.e. x = 81 then the other number is 9. i.e. 81, 9 HCF is 9.
Deshraj said:   9 years ago
How can we find out the co-prime of any numeric number? Explain.
Anisa said:   9 years ago
If LCM of two number is 729, then HCF is? Please give me the solution.
Diviya priya said:   9 years ago
If the sum of the 2 numbers is 220 and the LCM is 99. Then find the HCF?
Ankur said:   9 years ago
Guys! LCM * HFC = PRODUCT OF TWO NUMBERS. This is the rule.
(1)
Sonu said:   9 years ago
How can we solve this? Let me know the method of solution.
SURAJIT HALDER said:   9 years ago
If the sum of two numbers is 110 and LCM of those two numbers are 300. Find two numbers?

Can anyone answer this question?
Alay patel said:   9 years ago
If products of two numbers = products of HCF and LCM.

What if the sum of two numbers?
Kptel said:   9 years ago
If no's are 40 &15 what will be the sum of their reciprocals with the same condition?

And please tell me what would be the HCF if sum of their reciprocals is 11/120?

Please anyone answer this.
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