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Answer to Problem 9:

She scores two points each for 31, 7, and 23. She scores one point each for 12, 39, and 24. She scored a total of 6 + 3 or 9 points.

 

DEFINITIONS:

composite number—a number that has more than two factors.[1]

even—a whole number that is divisible by 2.[2]

factor—an integer that will divide evenly into another number.[3]

odd—a whole number that is not divisible by 2.[4]

prime number—a number that has exactly two different positive factors, itself and 1.[5]

square number—the number of dots in a square array; the product of an integer multiplied by itself.[6]

 


 

[1] Math at hand: A mathematics handbook (p. 520). (1999). Wilmington, MA: Great Source Education Group, Inc.

[2] Math at hand: A mathematics handbook (p. 523). (1999). Wilmington, MA: Great Source Education Group, Inc.

[3] Math at hand: A mathematics handbook (p. 524). (1999). Wilmington, MA: Great Source Education Group, Inc.

[4] Math at hand: A mathematics handbook (p. 529). (1999). Wilmington, MA: Great Source Education Group, Inc.

[5] Math at hand: A mathematics handbook (p. 531). (1999). Wilmington, MA: Great Source Education Group, Inc.

[6] Math at hand: A mathematics handbook (pp. 531, 535). (1999). Wilmington, MA: Great Source Education Group, Inc.