Q122
The sum of two numbers is 45. Their difference is 1/9 of their sum. Their LCM is = ?
The sum of two numbers is 45. Their difference is of their sum. Their LCM is = ?
A.
100
AnswerB.
150
C.
200
D.
250
Answer: Option A
Solution
Answer: Option A
Solution:
Let the two numbers be a and bThen, a + b = 45.......(i)
And a - b = 5......(ii)
Adding (i) and (ii) we get 2a = 50 or a = 25
Putting a = 25 in (i) we get b = 20
| 5 | 20 | - | 25 |
| 4 | - | 5 |
LCM = 5 × 4 × 5 = 100