Maths question from Social Forest Worker exam, 2026 by JKSSB
If a:bc:d, which of the following is correct using Componendo and Dividendo?
Last updated Jul 21, 2026
Correct Answer:
Option A —
(a + b) / (a - b) = (c + d) / (c - d)
1. Understand Componendo and Dividendo
If four quantities form a proportion such that a is to b as c is to d, then the ratio of the sum of the first two terms to their difference equals the ratio of the sum of the last two terms to their difference.
2. Apply the Rule
Take the left side: a plus b divided by a minus b.
Take the right side: c plus d divided by c minus d.
Equating both sides gives a plus b over a minus b equals c plus d over c minus d.
Conclusion
Correct Answer: A) (a + b) / (a - b) = (c + d) / (c - d)
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
