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?

”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”

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

Adds up to an EVEN number Adds up to a SQUARE number 4 2 3 1 Adds up to an EVEN number Adds up to a SQUARE number Factors of 10

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