The ratio of two numbers is 2 : 5 and their difference is 210. The smaller number is ____________.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 140.
The ratio of two numbers = 2 : 5
Let the two numbers be 2x and 5x.
So, 5x - 2x = 210
⇒ 3x = 210
⇒ x = 210/3 = 70
⇒ 2x = 2 × 70 = 140
Therefore, the smaller number is 140.