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 3 of 4.
Sonu said:
9 years ago
How can we solve this? Let me know the method of solution.
Ankur said:
9 years ago
Guys! LCM * HFC = PRODUCT OF TWO NUMBERS. This is the rule.
(1)
Diviya priya said:
9 years ago
If the sum of the 2 numbers is 220 and the LCM is 99. Then find the HCF?
Anisa said:
9 years ago
If LCM of two number is 729, then HCF is? Please give me the solution.
Deshraj said:
9 years ago
How can we find out the co-prime of any numeric number? Explain.
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.
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.
Avhi said:
9 years ago
The product of LCM and HCF of two no is 24 and the difference of two no is 2 then find the sum of two no?
Please give me the solution for this question.
Please give me the solution for this question.
Lucas said:
9 years ago
Please solve this question for me.
Two bulbs flash at regular intervals of 30 and 36 seconds respectively. They flash together at 10.45. At what time will they flash together?
(a) a second time.
(b) a 5th time.
Two bulbs flash at regular intervals of 30 and 36 seconds respectively. They flash together at 10.45. At what time will they flash together?
(a) a second time.
(b) a 5th time.
Subasini Barik said:
8 years ago
Two numbers are in the ratio of 5: 8. If 12 is added to each, they are in the ratio of 3: 4. Find the sum of two numbers? Please give me the answer and explanation.
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