Verified Answer :

square root of 11.
3 & 4

  1. square root of 33.

5 & 6

  1. square root of 8.

2 & 3

  1. cube root of 220.

6 & 7

  1. cube root of -80.

4 & 5

  1. fourth root of 20.

2 & 3

  1. square root of 300.

17 & 18

  1. fifth root of -35.

2 & 3

  1. square root of 150.

12 & 13

  1. cube root of -312.

6 & 7