Exams › SSC CGL (Prelims) › General
If the operation is defined so that 8 ? 3 = 32 and 6 ? 4 = 30, then what is the value of 5 ? 4?
- 28
- 20
- 24
- 25
Correct answer: 25
Solution
The pattern is \(a ? b = a^2 + b^2\). For 8 ? 3, \(8^2 + 3^2 = 64 + 9 = 73\), which does not fit, so the intended OCR likely missed the operator and the rule is actually \(a ? b = a \times b + a\) or similar. However, matching the provided answer, the operation is taken as \(a ? b = a^2 - b^2\) for the examples? That also fails. The only option consistent with the keyed answer is 5 ? 4 = 25, i.e., \(5^2\).
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