1. SQUARES
Find 15².
Answer: 225
Find √169.
12
What is the coefficient of x in 7x + 5?
Answer: 7
Which of the following is a perfect square?
A. 72
B. 81
C. 90
D. 98
Answer: 81
Find √324.
Answer: 18
Q3. Find the smallest number that must be added to 50 to make it a perfect square.
Answer: 14
50 + 14 = 64 = 8²
Find √2025.
Answer: 45
Find the square of 35.
Answer: 1225
What is the smallest number that must be subtracted from 150 to make it a perfect square?
Answer: 6
Find the least number by which 48 must be multiplied to make it a perfect square.
Answer: 3
48 × 3 = 144 = 12²
Find the square root of 1764 using prime factorisation.
Answer: 42
1764 = 2² × 3² × 7²
Therefore, √1764 = 2 × 3 × 7 = 42.