The range

Difficulty Starter · Set nk8emp

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1
What is the range of 9, 18, 4, 7?
2
What is the range of 17, 5, 9, 2?
3
What is the range of 14, 4, 2, 19?
4
What is the range of 17, 9, 18, 2?
5
What is the range of 4, 3, 3, 9?
6
What is the range of 18, 9, 20, 18?
7
What is the range of 17, 8, 10, 2?
8
What is the range of 10, 20, 13, 12?
9
What is the range of 11, 4, 10, 7?
10
What is the range of 12, 11, 8, 6?
11
What is the range of 7, 18, 14, 2?
12
What is the range of 19, 5, 2, 9?
13
What is the range of 16, 15, 15, 2?
14
What is the range of 10, 18, 2, 11?
15
What is the range of 18, 20, 19, 17?
16
What is the range of 5, 10, 14, 5?
17
What is the range of 8, 17, 10, 11?
18
What is the range of 11, 12, 5, 3?
19
What is the range of 6, 4, 19, 5?
20
What is the range of 11, 18, 7, 17?

What is in this set

The numbers in this set run from 2 to 20.
A careful solution takes 3 written steps on average.
The mistake this set invites most often, in 100% of the problems: that is the largest value; the range is the largest less the smallest.
Answers are a whole number.

Drawing 240 problems from this page produced 240 different ones, 100% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 5 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.