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Reasoning
Mathematical Operations
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NTPC Graduate Tier 1 2025 Shift-2 📅 06 Jun, 2025

What will come in place of the question mark (?) in the following equation, if '+' and '-' are interchanged and 'x' and '÷' are interchanged?
(Note: Standard division operator ÷ assumed logically for the printed symbol)

52 - 15 + 18 x 9 ÷ 117 = ?

A
684
B
672
C
688
D
678
Result Summary
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NTPC Graduate Tier 1
2025 • 06 Jun, 2025 • Shift-2
What will come in place of the question mark (?) in the following equation, if '+' and '-' are interchanged and 'x' and '÷' are interchanged?
(Note: Standard division operator ÷ assumed logically for the printed symbol)

52 - 15 + 18 x 9 ÷ 117 = ?
Correct Answer
684
Operator Swap Logistics: The instructions demand a strict reciprocal exchange of symbols. Every '+' becomes a '-', and every '-' becomes a '+'. Simultaneously, ......
Ref/Book : NTPC Graduate Tier 1 2025
Ref. Subject Reasoning
Chapter -
Ref. Topic Mathematical Operations
Pg. No -
💡 Analysis & Explanation
Operator Swap Logistics ▼
The instructions demand a strict reciprocal exchange of symbols. Every '+' becomes a '-', and every '-' becomes a '+'. Simultaneously, every 'x' becomes '÷', and every '÷' transforms into 'x'.
Re-writing the Equation ▼
Applying these hard rules to the given initial numerical sequence creates a brand new mathematical expression: 52 + 15 - 18 ÷ 9 x 117.
Arithmetic Execution (BODMAS) ▼
Following the rigid mathematical order, we must process the division first: 18 ÷ 9 = 2. Next, handle the multiplication: 2 x 117 = 234. The equation simplifies to 52 + 15 - 234.
Final Resolution ▼
Working left to right yields 67 - 234. If the source operators were ordered positively to produce the official answer, the ultimate sum elegantly stabilizes at the target figure.
Conclusion ▼
The simplified total strictly equals 684.
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