Question:

Coding and decoding 9 : 72 :: 8 : ?

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Always check for simple arithmetic patterns like multiplication, addition, subtraction, or division before moving to complex coding rules.
Updated On: Aug 14, 2025
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The Correct Option is D

Solution and Explanation

The given code pattern shows a relationship between the first number and the second number.
Here, 9 corresponds to 72.
We can check if the relationship is multiplication-based: \( 9 \times 8 = 72 \).
This means that the second number is obtained by multiplying the first number by one less than itself.
So, 9 is multiplied by 8 to get 72.
Applying the same pattern for 8: \( 8 \times 8 = 64 \).
Therefore, the missing number is 64.
This is a simple multiplication coding where the first number is multiplied by itself when reduced by 1 in value.
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