Probability
A fair coin is tossed once. What is the probability of getting heads?
1/2
What is the y-value when x = 3 in the function y = 2x + 1?
7
In a right triangle, what is sin 30°?
1/2
I am an odd number. Remove one letter and I become even. What number am I?
seven
What is the next number?
2, 4, 8, 16, ?
A die is rolled. What is the probability of getting an even number?
3/6 = 1/2
Is the relation {(1,2), (2,4), (3,6)} a function?
yes
What is cos 60°?
1/2
A farmer has 17 sheep. All but 9 die. How many are left?
How many months have 28 days?
All 12 months
A bag contains 3 red, 4 blue, and 3 green balls. What is the probability of choosing a blue ball?
4/10 = 2/5
Find the slope of y = 4x – 5.
4
What is tan 45°?
1
What comes once in a minute, twice in a moment, but never in a thousand years?
The letter M
If 5 machines make 5 widgets in 5 minutes, how long would 100 machines take to make 100 widgets?
5 minutes
Two coins are tossed. What is the probability of getting exactly one head?
2/4 = 1/2
Find the equation of a line with slope 3 and y-intercept −2.
y = 3x − 2
A right triangle has opposite side = 6 and hypotenuse = 10. Find sin θ.
3/5
A plane crashes on the border between two countries. Where do they bury the survivors?
They don't bury survivors.
Using only addition, how can you make 1000 from eight 8s?
888 + 88 + 8 + 8 + 8 = 1000
A box contains 5 red balls and 7 blue balls. Two balls are chosen without replacement. What is the probability that both are red?
(5/12) × (4/11) = 20/132 = 5/33
A function passes through (2,5) and (6,13). Find its equation.
y = 2x + 1
A ladder leans against a wall forming an angle of 60° with the ground. The ladder is 8 m long. How high does it reach?
h = 8 × sin 60°
h ≈ 6.93 m
You see a boat filled with people. It has not sunk, but when you look again, you don't see a single person. Why?
All the people were married.
A bat and a ball cost $1.10 in total. The bat costs $1 more than the ball. How much does the ball cost?
$0.05