1. 6 ages are listed from smallest to biggest
3 Square numbers are listed from smallest
to biggest
A B C D E F
A B C
The mean of the 5 smallest ages is 21
The mean of the 5 largest ages is 29
What could the ages be?
The range of the numbers is 72
The mean is NOT a whole number
What could the numbers be?
4 Square numbers are listed from smallest
to biggest
4 Prime numbers are listed from smallest
to biggest
A B C D
A B C D
The range of the numbers is 65
The median is 65
What could the numbers be?
5, 17, 24, 28, 31, 45
The range of the numbers is 21
The median is 18
What could the numbers be?

2. ”The median grade in 11b1 is 9.
“The most common grade in 11a1 was a grade 9 so this class did the best”
Grade
Frequency 5 14 6 7 8 9 15
”The median grade in 11b1 is 9.
That means more than half the class must have achieved a grade 9 so 11b1 did the best”
“More students achieved a grade 9 than any other grade, so 11a1 performed the best”
11c1
11d1
The mean grade for 11d1 is 7.
This means if the results are shared out evenly between the 30 students in the class they would get a grade 7.
The range of results in 11d1 is 8
11d1 did well because the range is 8 and the mean is 7
”11c1 did the best because the whole class achieved either a grade 9 or 8”

3. 11a2
11b2
11c2
Grade 4 7 2 12
Grade 5 5 1
Grade 6 6 3
Grade 7
Grade 8 18 11
Grade 9 8
Total 30

5. Adds up to an EVEN number Adds up to a SQUARE number4 2 3 1
Adds up to an EVEN number
Adds up to a SQUARE number
Factors of 10

6. Adds up to an EVEN number Adds up to a SQUARE number
Using the numbers 1 – 4 only ONCE in each row and column
Adds up to an EVEN number
Adds up to a SQUARE number
Are all Factors of 10
ODD
EVEN