Correct Answer:
B. 13
The square root of a number 'x' is a value 'y' that, when multiplied by itself, gives 'x' (i.e., y * y = x). We need to find the square root of 169.
- We are looking for a number that, when squared, equals 169.
- Let's test the given options:
- A: 11 * 11 = 121 (Incorrect)
- B: 13 * 13 = 169 (Correct)
- C: 17 * 17 = 289 (Incorrect)
- D: 289 is the square of 17, not the square root of 169. This is a common distractor, confusing the square of a number with its square root.
Therefore, the square root of 169 is 13. Knowing common perfect squares is helpful for these types of questions.