9 : 72 :: 12 : ?

110Correct answerYour answer120Correct answerYour answer121Correct answerYour answer132Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

$72 = 9 \times 8$ : the number times the number just below it.
$12 \times 11 = 132$ .

Worth noting

110 is $11 \times 10$ (both numbers one too small), 120 is $12 \times 10$ and 121 is $11^2$ . The rule 'multiply by 8' also fits 9 : 72 but gives 96, which is not offered, so test the other natural rule.

Concept: Number analogy: n × (n − 1)
Typical timeTypical: 70 s
Your timeYours: —

The rule this testsNumber analogies

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9 : 72 :: 12 : ?

Explanation