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kodGreya [7K]
3 years ago
11

What is the ones digit of a number if its cube ends in 7

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
3 0

Well, I have never seen a question posed this way, but let's check it out by trial and error.

1^3 = 3

2^3 = 8

3^3 = 27 Hey! There's one. And the ones digit ends in 3.

Let's try another number that ends in 3 and see if it works as well.

13^3 = 2197 Wow. It works again. I never noticed this before, so you taught me something new.

I will test one more.

33^3 = 35937 Bingo. I think we have a winner.

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I don’t get this question
faltersainse [42]

\text{Use pythagorean theorem}

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\textbf{a = 6.71}

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