Question:
If $1 \times 7 = 8$, $2 \times 7 = 16$, $3 \times 7 = 24$, $4 \times 7 = 32$, then what is the value of $9 \times 7$?
If $1 \times 7 = 8$, $2 \times 7 = 16$, $3 \times 7 = 24$, $4 \times 7 = 32$, then what is the value of $9 \times 7$?
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When sample equalities look wrong arithmetically, treat them as a coding rule. Compare outputs to see if they depend only on the first number, the second, or both.
Updated On: Aug 14, 2025
- 63
- 72
- 81
- 90
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The Correct Option is B
Solution and Explanation
Pattern check: The right sides are $8,16,24,32$. These are $8\times 1,\;8\times 2,\;8\times 3,\;8\times 4$.
So the rule used in the question is $n \times 7$ is being encoded as $8n$ (i.e., multiply the first number by $8$; the $7$ is a distractor).
Apply the rule to $9 \times 7$: $8 \times 9 = 72$.
So the rule used in the question is $n \times 7$ is being encoded as $8n$ (i.e., multiply the first number by $8$; the $7$ is a distractor).
Apply the rule to $9 \times 7$: $8 \times 9 = 72$.
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