Question

How many positive cubes less than 5000 ends in the digit 5

Answer 1

Answer:

2

step by step explanation:

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*5*5=125

15^3=15*15*15=337

25^3=25*25*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.