Which of the following numbers doesn't belong? 64, 16, 36, 32, 8, 4

Mathematics

2 answers:

zepelin [54]3 years ago

7 0

36 doesn't belong because it is not a power of 2.

64= 2^6
16= 2^4
32= 2^5
8=2^3
4=2^2

statuscvo [17]3 years ago

3 0

36 because it is the only one not a multiple of 8

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Jet001 [13]

This can be easily solved, especially with a calculator.
With the calculator, you can find that $\sqrt{42}$ is about 6.4807.
Multiply that by 2, you get about 13 inches.

If you can't use a calculator, then you can just estimate. Since we know that $\sqrt{36}$ is 6 and $\sqrt{49}$ is 7, $\sqrt{42}$ is in between them, so you can just say somewhere around 6.5.

Multiply 2 * 6.5 and you get 13 inches.