eg = 2 gives (2 + 12) = 14 or x (5 + 9) = 14 Guess a value for and correctly x M1 = 2.5 gives 16, = 3 gives 18, = x x x works out area above 12 cm2 3.5 gives 20 Tries a value between 1 and 2 and M1dep correctly works out area oe 1.5 A1 SC2 3 3.5 and 1 1.5 seen or   3 2.5 and 1 4.5 seen  
Guess a value for x and correctly works out area above 12 cm2 M1 eg x = 2 gives (2 + 12) = 14 or (5 + 9) = 14 x = 2.5 gives 16, x = 3 gives 18, x = 3.5 gives 20 Tries a value between 1 and 2 and correctly works out area M1dep 1.5 A1 oe SC2 3  3.5 and 1  1.5 seen or 3  2.5 and 1  4.5 seen