Beslonderie Beslonderie
  • 07-09-2018
  • Mathematics
contestada

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

Respuesta :

churchkeys88 churchkeys88
  • 07-09-2018

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.

Answer Link

Otras preguntas

The gravitational field at the Moon in N/kg due to the Earth is approximately (G = 6.67 × 10-11 N m2/kg2, the mass of the Earth is 5.98 × 1024 kg, and the dista
Which phrase best completes the diagram? Features of Federal Reserve banks Are divided into 12 districts Execute federal monetary policy ? A. Adjust Federal Res
Which of the following was a failed colony?
Explain how the idea of majority rule relates to the rights of the minority in the American democratic political system.
what was the purpose of Jacinto's creation of kartilya?​
How many cubic yards make up 6,683 cubic feet?
In the U.S., the _________ mandates that public water supplies be monitored regularly for microorganisms, chemicals, and various metals.
Help me find the given
Plz help me T-T it’s math
"I will clap I will sing I will celebrate " what rhetoric device is being used