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64 9 12
729 144 108
27 64 ?
What is 3rd number?

User Pytth
by
8.2k points

1 Answer

1 vote

Answer:

24

Explanation:

You have the triples (64, 9, 12), (729, 144, 108) representing a relation, and you want to find the third number in the triple (27, 64, ?).

Relation

There are many ways to relate the numbers of the given triples. One we can recognize is ...

for triple (a, b, c), ...

c = f(a, b) = (∛a)(√b)

Application

Then the missing 3rd number is ...

c = (∛27)(√64) = (3)(8) = 24

The 3rd number is 24.

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64 9 12 729 144 108 27 64 ? What is 3rd number?-example-1
User Joe Conway
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