Nova Math - Problem Set B: Substitution 2

Question Name	Average time to answer (seconds)	Total correct answers	Total incorrect answers
Column A x > 0 Column B x^2 + 2 x^3 - 2	57	146	43
Column A m > 0 Column B m10 m100	29	163	19
Column A x < 0 Column B x2 - x5 0	67	104	75
Column A -1 < x < 0 Column B x 1/x	59	128	50
Column A Column B ab2 a2b	48	163	12
Column A y ≠ 0 Column B x/y xy	77	162	12
Column A a < 0 Column B 1/a a	53	133	40
Column A x = y ≠ 0 Column B 0 x/y	41	138	33
For all numbers x, [x] denotes the value of x3 rounded to the nearest multiple ... ...	131	98	73
... ...	98	155	13