Brain Teasers
Integer Operations
Factoring
Estimation and Mental Math
Linear Equations
100
Billy's mother had five children. The first was named Lala, the second was named Lele, the third was named Lili, the fourth was named Lolo. What was the fifth child named?
Billy
100
Value for m in the equation -5 + 16 = m
11
100
x2 + x - 42 = 0
x=-7
x=6
100
What is the total amount?
$126.00
One hundred twenty-six dollars
100
Mike spent 6 dollars for each T-shirt. He spent a total of 48 dollars. How many T-shirts did he buy? The equation for the problem is...
What is 6x = 48 ?
200
A man was walking in the rain in the middle of nowhere without a coat or an umbrella. He got soaked, but not a single hair on his head was wet. How can this be?
The man is bald
200
Value for g in the equation-75 + (-78) = g
-153
200
x2 + 5x + 6 = 0
x=-3
x=-2
200
The total amount of this array
OOOOOOO
OOOOOOO
OOOOOOO
What is 21?
200
The equation for how many fingers a person has is
10x = y. The slope for this relationship is
What is 10?
300
A truck driver is going down a one-way street the wrong way, and passes at least ten cops. Why is she not caught?
She is walking on the sidewalk
300
Value for t in the equation -240 - (-24) = t
-216
300
x2 + 2x - 3 = 0
x=1
x=-3
300
The number of people who live in Corpus Christi to the nearest 1000.
What is 325,000?
300
Value for x in the equation -3x + 4 = 13.
What is -3?
400
Three doctors said that Paul was their brother. Yet, Paul claims he has no brothers. Who is lying?
No-one, the doctors are Paul's sisters
400
Value for r in the equation -337 x -98 = r
33,026
400
3x2 + 3x - 36 = 0
x=-4
x=3
400
The average weight of these 4 turtles:
Turtle 1: 20 lbs Turtle 2: 20 lbs
Turtle 3: 22 lbs Turtle 4: 22 lbs
What is 21 pounds?
400
The point slope form of y + 2x = 81
What is y = -2x + 81?
500
With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims proclaiming might; physically joining with a single bite.
Stapler
500
Rounded to the nearest whole number,
20 x ____ = -8462 is...
What is -423?
500
x2 + 5x + 6 = 20
x=2
x=-7
500
This weekend, Sarai went to La Palmera mall and spent money at Forever 21 and H&M. Sarai bought 2 shirts for $11.99 each, and a pair of pants for $25.98. The change she will get from a 50 dollar bill is?
What is 4 cents?
500
Value for x in the equation 47 - 3x = 32
What is x=5