Which number is closest to \( \sqrt{42} \) ? 6.4 7.1 6.9 7.5 Submit

The number closest to \( \sqrt{42} \) is approximately 6.48, which falls between the values of 6.4 and 6.9, making 6.4 the best choice. If you're trying to remember square roots, knowing that \( \sqrt{36} = 6 \) and \( \sqrt{49} = 7 \) can help you easily estimate that \( \sqrt{42} \) should be just a tad above 6.4. For a quick check, you can square the options. If you take 6.4, \( 6.4^2 = 40.96 \), which is close to 42, while \( 6.9^2 = 47.61 \) is further away. This method can save you time when estimating square roots on-the-go!