What do you call it when the nurse gives you a shot you hardly feel?

Question

s.r. = square root
s.r.5 * s.r. 15.

my choices are 5s.r.3, 20s.r.5, 4s.r.10, 3s.r.2, 3s.r.10, 2s.r.6, 9, 5s.r.6, 10s.r.3.

Answer 1

(sqrt5) * (sqrt15)= (sqrt75)=
=(sqrt25)(sqrt3)= 5(sqrt3)

What do you call it when the nurse gives you a shot you hardly feel?

What?

Answer 2

it was a riddle. the answer was a jab well done.

Answer 3

I knew if was a riddle. That's why I asked "What" !

:)thanks

Answer 4

5 s.r. 3

Answer 5

A jab well done

that is the answer you should do it yourself