Chapter 6: Squares and Square Roots

Answer Key (For Teachers)

1. Answer: $15$.
   Working: $15^2=225$.
2. Answer: $13$.
   Working: $2925 = 3^2\cdot 5^2\cdot 13$; divide by $13$.
3. Answer: $35$.
   Working: $35^2 = 1225$.
4. Answer: $12$
   Working: $12^2$.
5. Answer: $45$
   Working: $45^2$.
6. Answer: No.
   Working: No — square roots not integer.
7. Answer: $2.5$
   Working: $2.5^2$.
8. Answer: $5$
   Working: $180 = 2^2\cdot 3^2\cdot 5$; need factor of $5$.
9. Answer: $9801$
   Working: $(100-1)^2$.
10. Answer: $15$
    Working: $15^2$.