Haunted Brain Teasers
I am an odd whole number. Remove one letter from my English name and I become even. What number am I?
Seven
A bag contains 3 orange candies and 7 black candies. What is the probability of randomly drawing an orange candy?
3/10, 30%, 0.3
A triangular witch’s hat has two angles measuring 50° and 60°. Find the third angle.
70°
A witch’s mystery number satisfies x + 13 = 20. Find x.
7
A pumpkin has 8 carved teeth. How many teeth do 7 identical pumpkins have?
56 teeth
A ghostly clock strikes 6 times in 5 seconds, with equal time between strikes. How many seconds pass from the first to the last strike when it strikes 12 times?
11 secs
Roll a fair six-sided die. You escape if you roll a number greater than 4. What is your probability of escaping?
1/3
A rectangular graveyard is 12 meters long and 5 meters wide. Find its area.
60 m²
Three identical potions cost $24 altogether. Solve 3p = 24.
p = 8
A witch buys 3 pumpkins for $4.50 each. How much does she spend?
$13.50
Three black cats catch three mice in three minutes. At the same constant rate per cat, how many cats are needed to catch 100 mice in 100 minutes?
3 cats
Flip a fair coin twice. What is the probability of getting heads BOTH times?
1/4
A circular cauldron has a radius of 3 feet. Give its circumference in terms of π.
6π feet
A spell reads 4x − 7 = 21. Find x to break it.
7
A trick-or-treater eats ¼ of their 60 candies. How many candies remain?
45 candies
In a race through a cemetery, you pass the runner in second place. What place are you now in?
Second place
A bag contains 4 chocolate bats and 6 gummy worms. You randomly draw two candies WITHOUT replacement. What is the probability both are chocolate bats?
(4/10)(3/9) = 2/15
A 10-foot ladder leans against a haunted house. Its base is 6 feet from the wall. How high up the wall does it reach?
8 feet
A rectangular spellbook has width x and length x + 3. Its perimeter is 30 inches. Find its width.
6 inches
A haunted shop discounts a $40 costume by 25%. What is the sale price before tax?
$30
A three-digit crypt code has digits that add to 12. Its hundreds digit is twice its ones digit. Its tens digit is 3 more than its ones digit. What is the code?
642
Three fair coins are flipped. What is the probability of getting AT LEAST one head?
1-(1/2)3 = 7/8
A miniature pyramid has a square base with side length 6 inches and a perpendicular height of 10 inches. Find its volume.
120 in³
A cursed number satisfies x² − 5x + 6 = 0. Name BOTH possible values.
2 and 3
A candy bowl starts full. Zombies eat half the candy, then ghosts eat ⅓ of what remains. What fraction of the original candy is left?
1/3