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# 3^20 + 3^20 + 3^20 =

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Re: 3^20 + 3^20 + 3^20 = [#permalink]
Bunuel wrote:
$$3^{20}+3^{20}+3^{20}=$$

A. $$9^{60}$$

B. $$9^{20}$$

C. $$3^{60}$$

D. $$3^{23}$$

E. $$3^{21}$$

$$3^{20}+3^{20}+3^{20}= 3*3^{20} = 3^{21}$$

IMO E
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Re: 3^20 + 3^20 + 3^20 = [#permalink]
Bunuel wrote:
$$3^{20}+3^{20}+3^{20}=$$

A. $$9^{60}$$

B. $$9^{20}$$

C. $$3^{60}$$

D. $$3^{23}$$

E. $$3^{21}$$

Simplifying, we have:

3^20(1 + 1 + 1) = 3^20 x 3 = 3^21

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Re: 3^20 + 3^20 + 3^20 = [#permalink]
Take 3^20 common.

We will then have 3^20(1 + 1 + 1)
= 3^20 x 3
= 3^21

Option E.
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Re: 3^20 + 3^20 + 3^20 = [#permalink]
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Re: 3^20 + 3^20 + 3^20 = [#permalink]
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