Question

How many positive cubes less than 5000 end in the digit 5?

Answer 1

Number of  positive cubes less than 5000 end in the digit 5 is 2.

Step-by-step explanation:

To find : How many positive cubes less than 5000 end in the digit 5?

Solution :

As the number end with digit 5.

Which means the number is multiple of 5 and end with 5,

i.e. 5,15,25,..

Now, we find cube of these numbers

$5^3=5\times 5\times 5=125$

$15^3=15\times 15\times 15=3375$

$25^3=25\times 25\times 25=15625$

But 15625 >5000.

So, The required numbers are 5 and 15.

Therefore, Number of  positive cubes less than 5000 end in the digit 5 is 2.

#Learn more

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