If 1.5 cm of a pencil is purple, 0.5 cm of the remaining is black and the remaining 2 cm is blue, what is the total length of the pencil?	Pick:  A) 5 cm  B) 3 cm  C) 1 cm  D) 4 cm  E) 2 cm

Rationale: purple is 1.5 cm black is 0.5 cm blue is 2 cm 1.5 + 0.5 + 2 = 4 cm answer is d ) 4 cm
Answer: D