Square roots of perfect squares

Difficulty Starter · Set eiotx3

Fill in what you can and press Check. Nothing you type is sent anywhere.

1
What is the square root of 25?
2
What is the square root of 16?
3
What is the square root of 25?
4
What is the square root of 25?
5
What is the square root of 100?
6
What is the square root of 81?
7
What is the square root of 81?
8
What is the square root of 81?
9
What is the square root of 81?
10
What is the square root of 9?
11
What is the square root of 36?
12
What is the square root of 81?
13
What is the square root of 36?
14
What is the square root of 9?
15
What is the square root of 100?
16
What is the square root of 16?
17
What is the square root of 25?
18
What is the square root of 25?
19
What is the square root of 9?
20
What is the square root of 36?

What is in this set

The numbers in this set run from 4 to 100.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 45% of the problems: the number was halved.
Answers are a whole number.

Drawing 240 problems from this page produced 9 different ones, 4% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 6 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.