a) 24 = 3 x 2 x 4
36 = 3 x 4 x 3
48 = 3 x 4 x 4
b) 24 = 3x (5+3)
36 = 3 x (8+4)
48 = 8 x (4+2)
c) 24 = 4 x (8-2)
36 = 6 x (9-3)
48 = 6 x (9-1)
