1. 

Which of the following sets of operations with the usual notations replacing the stars in the order given makes the statements valid?

√ 100  ★ √ 16 ★ √ 225 ★ √ 1
A. x, =, +
B. +, =, -
C. +, =, x
D. -, x, =

Answer: Option B

Explanation:

From option (B), √ 100  + √ 16  = √ 225  - √ 1 

 10 + 4 = 15 -1

 14 = 14