Problem Solving Worksheets With Answer Key - Math Stars Page 39
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39Vol. 7 No. 10
6. [18 three-legged stools and 13-four legged stools] Students can use a guess and check strategy,
organize a table or chart to examine the possibilities or the following logic: All stools use at least three
legs or 31 x 3 = 93 legs. This leaves 106 - 93 or 13 legs for the four legged stools.
7. [E, N, T, E] One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten, Eleven.
8. [21 students] After the first count off 1/4 or seven students sat down. The 21 left then did another
count and this time 1/3 or seven more took seats. With 14 remaining on their feet, the last count off
removed 1/2 or seven more from the group so the seated students number 21.
9. [a) 8 cubes; b) 24 cubes; c) 8 cubes] Students may find using unifix cubes a useful tool in modelling
this problem.
10. [Andi 80 coins; John 240 coins; Rhonda 40 coins] Rhonda = Kay + 15 or 25 + 15 = 40
Andi
= 2 x Rhonda or 2 x 40 = 80
John
= 3 x Andi or 3 x 80 = 240
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