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Subtraction
Addition
Multiplication
Division
Riddles
100
n - 13 = 14
What is 27
100
n + 61 = 200
What is 139
100
75m=-225
What is -3
100
1/3v = 5
What is 15
100
I am an odd number. Take away one letter and I become even. What number am I?
Seven
200
n-21 = 50
What is 71
200
-11 = y + 6
What is -17
200
-12k = 144
What is 12
200
2/5d = 20
What is 50
200
Which weighs more, a pound of feathers or a pound of bricks?
Neither, they both weigh a pound
300
k - 10 = 20
What is 30
300
-5 = 14 + z
What is - 19
300
-99=9j
What is -11
300
7/5c = 14
What is 10
300
What gets wetter and wetter the more it dries?
A towel
400
b-67 = -45
What is 22
400
-9 + r = 18
What is 27
400
-63=-21v
What is 3
400
3/2m = 9
What is 6
400
How many toes does a three-toed sloth have?
What is 12
500
s-902 = -3,432
What is -2530
500
10 + m = 8
What is -2
500
-31x = 155
What is 5
500
3/4y = -15
What is -20
500
What travels around the world but stays in one spot?
A stamp