Question

Estimate the square root to the nearest integer.

2. 39

A : 5
B: 8
C: 6
D: 7

Answer 1

2

Explanation:

Think: 2.39 is sandwiched between the perfect squares 1 and 4.

The difference between 1 and 4 is 3. From 1 to 2.39 is a step of 1.39; from 2.39 to 4 is a step of 1.61. Therefore, 2.39 is closer to 1 than to 4, and we estimate 2.39 to be 2 (to the nearest integer).

Answer 2

C

Explanation:

The square root of 39 is ~6.25 so 6 is closest