Holiday Brain Teasers (with answers)

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#1
How many four-cent postal
cards are there in a dozen?
$.04
$.04
$.04
$.04
$.04
$.04
$.04
$.04
$.04
$.04
$.04
$.04
#2
How far can you walk into a
forest?
Halfway, because once you
get to the middle you are
walking OUT of the forest
#3
How much dirt is there in a hole
that is three feet wide, four feet
long, and two feet deep?
None,
because if
there was
dirt in the
hole then it
wouldn’t be
a hole . . .
#4
There was a blind person who
had a brother, but this brother
had no brothers. What was the
relationship between the two?
They are brother and sister.
#5
“How much will one cost?” asks
a customer.
The clerk replies, “Twenty cents.”
“How much will twelve cost?”
The reply, “Forty cents.”
“I’ll take 912.”
What is the customer buying?
#6
Rearrange the letters of
NEW DOOR
to make one word.
ONE WORD
#7
If six glasses are arranged in a straight line and the
first three are full of water and the last three are
empty, what is the fewest number of glasses that
can be moved so that the glasses alternate empty,
full, empty, full, . . . ?
#7
If six glasses are arranged in a straight line and the
first three are full of water and the last three are
empty, what is the fewest number of glasses that
can be moved so that the glasses alternate empty,
full, empty, full, . . . ?
#8
Horace claimed that
“2 x 10 = 2 x 11”
is a true statement.
What was his
explanation?
20 = 22
Twenty is equal to Twenty-Two
Twenty is equal to Twenty, too
#9
What do all of the following
have in common?
deft
canopy
first
calmness
laughing
crabcake
stupid
hijack
Hint #1: 3
Hint #2: Baa Baa Black Sheep and
Twinkle Twinkle Little Star
#10
A train that is one mile long traveling at
60 mph (miles per hour) enters a tunnel
that is one mile long. How long until the
train is fully out of the tunnel?
One minute
One minute
#11
Write twelve thousand twelve
hundred twelve.
12,000
1,200
12
13,212
#13
What mathematical symbol can be
placed between 2 and 3 so that the
resulting expression names a number
between 2 and 3?
2 •3
#12
Divide 30 by 1/2 and add 10.
What is your answer?
Most of you will do 30 ÷ 2 + 10 and get 25
But…it’s 30 ÷ ½ + 10, which is equal to…
30 ÷ .5 + 10, which is equal to…
30 • 2 + 10, which is equal to…
70
#14
A student correctly shows that
1/2 of twelve is seven. How?
Make as many words from these as you can…
PRE-ALGEBRA HOLIDAY

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