Select all irrational numbers.

Option 1 , 2 & 5

Step-by-step explanation:

4 & 16 are perfect squares. So , 1/4 & 1/16 are also perfect squares. But 2 , 8 & 10 are not perfect squares. So root of 1/2 , 1/8 & 1/10 are irrational numbers.

Verification :-

1)

Hence , it is irrational.

2)

So , it is irrational.

3)

So , it is rational.

4)

So it is rational.

5)

Hence it is irrational.

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8