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Analogies and Classification · Question 26 of 66

Question 26

MediumOriginal question

8 : 65 :: 11 : ?

Options for question 26

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. 82=648^2 = 64 and 65=64+165 = 64 + 1: square the number and add 1.

  2. 112+1=121+1=12211^2 + 1 = 121 + 1 = 122.

Worth noting

121 stops at the square and 120 subtracts 1 instead of adding. 132 is 11×1211 \times 12, which does not fit 8 : 65 (8×9=72)(8 \times 9 = 72).

Concept
Number analogy: square plus one
Typical time
70 s
Your time
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