Question

IS 13,15,16,18 AND 25 PERFECT SQUARES PLZ EXPLAIN

Answer 1

Answer:

Out of these only 16 and 25 are perfect squares as they have their roots as whole numbers whereas the others don't.

Step-by-step explanation:

Answer 2

Answer:

Heya mate your answer

Step-by-step explanation:

The answers given are all correct.

8=23  

12=22∗3  

15=3∗5  

20=22∗5  

So choosing the maximum of all the prime exponents that exist in the numbers above, we have,

LCM =  23∗3∗5=120  

Now, I will use an approach which others have not used to get to the least perfect square.

120 =  23∗3∗5  

Now in a perfect square, ALWAYS, exponent of each prime is always even.

So, we will change the exponent of 2 from 3 to 4.

We will change the exponent of 3 from 1 to 2.

We will change the exponent of 5 from 1 to 2.

Finally we have the number  24∗32∗52=3600 .

So, required answer is 3600.