#1
rule : r - 12
Missing number = 25 (37-12 = 25)
#2
rule: a + 34
Missing number = 43 (9+34 = 43)
#3
rule: s - 5
Missing number = 20 (25-5 = 20)
#4
rule: b+16
Missing number = 0 (0+16= 16)
#5
rule: w+3
Missing number = 9 (6+3= 9)
#6
rule: n-11
Missing number = 22 (33-11= 22)
#7
15 - n when n = 9
15 - 9 =6
#8
32 more than a number d:
32 +d
answer is C. 32+d
#9
Variable is an unknown value. So you need to solve that unknown value in the problem.
