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)
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:
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.
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.
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.
Abhi said:
8 years ago
The product of two no=2448 and the difference of the two no is equal to their HCF and the HCF is a perfect square. Find the no?
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?
Can anyone answer this question?
Arjunn said:
1 decade ago
What is the hcf and lcm of 150, 210, 375?
Is the product of hcf and lcm equal to product of these 3 numbers?
Is the product of hcf and lcm equal to product of these 3 numbers?
Babita loky said:
1 decade ago
The hcf and lcm of two numbers are 4 and 48 respectively. One of the number is 12. Find the other number?
Jedi Knight Ani said:
1 decade ago
@Amol.
Reciprocal is calculated by dividing 1 by that number. Sum of the reciprocals = 1/a + 1/b.
Reciprocal is calculated by dividing 1 by that number. Sum of the reciprocals = 1/a + 1/b.
Kishan said:
1 decade ago
If HCF of two numbers is 98 and LCM of numbers is 2352 then what is the sum of these numbers?
ANSHUL JYOTI said:
2 years ago
@Nirmala.
7/16 + 5/24 = LCM ( 16, 24) = 48.
Therefore (7x3)/(16x3) + (5x2)/(24x2) = 31/48.
7/16 + 5/24 = LCM ( 16, 24) = 48.
Therefore (7x3)/(16x3) + (5x2)/(24x2) = 31/48.
Alay patel said:
9 years ago
If products of two numbers = products of HCF and LCM.
What if the sum of two numbers?
What if the sum of two numbers?
Nirmala said:
9 years ago
Find the sum 7/16 + 5/24.
Give me the answer with the proper explanation.
Give me the answer with the proper explanation.
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