Multiple Choice Question

If 20% of a number is added to 90, then the result is the same number. 80% of the same number is:

A

90
B

120
C

110
D

100

Explanation:

x = 90 + 0.2x ⇒ 0.8x = 90 ⇒ x = 112.5 ⇒ 80% = 90.

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This question belongs to the set "RRB Group D 2025 Question Paper – 27 November Shift 1 | Set 2 (Q26–Q50) Mathematics". Click below to read detailed notes and attempt the full quiz.

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