SSC CGL 2025 Tier-I · 23 September 2025, Shift 1 · General Intelligence and Reasoning · Question 20 of 100

We transcribed this text from the pictures on a candidate's response sheet for this shift; the answer is the key SSC colour-marked on that sheet. Solution last reviewed 13 September 2026.

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SSC does not publish CGL question papers or a public answer key. From 2025 the candidate response sheet prints every question and option as a picture, so the text here is transcribed from those pictures for this shift and checked against them independently; where the layout carries meaning, the picture is shown as well. Each answer is the key SSC colour-marked on that sheet. SSC released a tentative key for challenge and later its final one, both only to candidates behind a login, and the sheet does not say which of the two it carries. The solutions are written by UnlockIAS.

A person spends 80% of his income and saves ₹2000. What is his income?

(a)₹8000
(b)₹9000
(c)₹10,000
(d)₹7500

Answer

Why

Correct — C.
Rule: savings % = 100% − spending %.

He spends 80%, so he saves 100% − 80% = 20%.
20% of income = ₹2000

Income = 2000 × 100 ⁄ 20
= 2000 × 5 = ₹10,000 → option (c).

Why the others are wrong

(a)
₹8000 — ₹8000 is what he spends, 80% of ₹10,000. As an income it fails the check: 20% of ₹8000 saves only ₹1600.
(b)
₹9000 — 20% of ₹9000 is ₹1800, short of the ₹2000 he saves. The income must be 2000 ÷ 0.2 = ₹10,000.
(d)
₹7500 — 20% of ₹7500 is ₹1500. ₹2000 is a fifth of the income, so the income is 5 × 2000 = ₹10,000.

Concept

Income splits into what is spent and what is saved, so the two percentages add to 100%. Turn the stated amount into its own percentage and scale up.

Here savings are 20%, which is one fifth, so the income is 5 × ₹2000. Converting percentages to fractions (20% = 1⁄5, 25% = 1⁄4) turns these into one-line sums.

Key facts

Savings % = 100% − expenditure %.
20% = 1⁄5, so an amount that is 20% of the income is one fifth of it.
Here expenditure is ₹8000 and savings ₹2000, together ₹10,000.

Study next

Percentage change in savings when income and expenditure both changeIncome split across several heads in successive percentagesPercentage-to-fraction equivalents such as 12.5% = 1⁄8

Common traps

Taking the expenditure, ₹8000, as the income.
Dividing ₹2000 by 0.8 instead of 0.2, working from the spending share rather than the saving share.

The 80% spending set-up comes back in harder form at 9 Sep 2024, 12:30, Quant Q.15, where income rises 20% and expenditure 10%, so savings rise 60%.

At 21 Sep 2025, 09:00, Quant Q.13 income rises 25% with expenditure unchanged, so savings rise 125%.

Related PYQs

No directly related past PYQ was found.