Square Root by Repeated Subtraction

Q. While finding the square root of 36 by repeated subtraction, in which step does 20 occur?

1. 5${}^{th}$
2. 3${}^{rd}$
3. 4${}^{th}$
4. 6${}^{th}$

Q. ${12}^2=154$

1. False
2. True