AlgebraQuestion 472 of 550

If √(x + 1) = 4, what is x?

  1. 15
  2. 16
  3. 17
  4. 3
Show answer

Correct answer: 15

Square both sides: x + 1 = 16, so x = 15.

Test structure: ETEC guide to the GAT

Practice algebra

Questions last reviewed: 21 October 2026