Find $\sqrt{1444}$ .

28Correct answerYour answer32Correct answerYour answer34Correct answerYour answer38Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

The number ends in 4, so its square root ends in 2 or 8.
$35^2 = 1225$ and $40^2 = 1600$ , so the root lies between 35 and 40, which means it ends in 8: it is 38.
Check: $38^2 = 1444$ .

Worth noting

32 also ends in a digit whose square ends in 4, but $32^2 = 1024$ . Always bracket the root between two easy squares.

Ten questions from Simplification & Approximation, at your own pace.

Ten questions from Simplification & Approximation, at your own pace.

Find 1444\sqrt{1444}1444​.