(1) Make 24: (a)  (6 x 4) x (5 – 4) = 24      (b)  (9 x 4) – (2 x 6) = 24
                       (c)  (4 x 7) – (2 + 2) = 24      (d)  (5 + 3) x (8 x 1) = 24

(2) Letters, Numbers... Confusion!!:  A = 1,  B = 5,  C = 7,  D = 3,  E = 9

THIS WILL ALSO WORK:    A = 1,  B = 5,  C = 8,  D = 2,  E = 8   (Other answers may be possible)

(3) Farmer Yobbler:  a) 49 cents per carrot (actually 48.6 cents).
                                   b) $116.25 more (don't forget, there are 31 days in both months)

(4) Mystery Numbers:  a) 834      b) 180 (also: 300, 900, 720, 120, 660 will work for clues given)      c) 6084      d) 193  (Other answers may be possible)

(5) How High?:   20.6 metres (For answers derived via scale drawings, some flexibility in accuracy may be exercised.)

(6) Some More Soma:   N/A; Sight the solutions in class.

(7) Multi-pointed Stars:   N/A; sight solutions in class.

(8) Terrible Tangrams:  N/A; sight solutions in class.

(9) Problem Solving Galleria:
Problem 1:  a) $20      b) $40
Problem 2:  a) x = –2      b) x = 0      c) x = –4
Problem 3:  $18, 798.50
Problem 4:  33.7cm or 337mm
Problem 5:  11, 951.712 grams or 11.951712kg
Problem 6:  a) 4.7 metres      b) 1.014 metres
Problem 7:  Daisy earns $3, 562.65 more than Danny each year.
Problem 8:  $1.12 saved in total per case.
Problem 9:  147 full turns
Problem 10:  a) Car costed $26, 550.86
Problem 11:  17 full rotations (actually 17.68 turns)
Problem 12:  $23.72 per hour

(10) Emma:  1.5 litres of fuel remaining.