AMO 2021 — Secondary 1 (Grade 7) Question 1

Question 1

Find the value of $\sqrt{\sqrt{0.0081}+\sqrt{0.0001}+\sqrt{0.81}}$.

1. $1$
2. $-1$
3. Both 1 and −1
4. Decimal numbers do not have square roots
5. $\sqrt{0.019}$