Logic Puzzles
There are 3 apples in a basket. You take away 2. How many do you have?
2
A cowboy rode into town on Friday. He stayed for three days and left on Friday. How is this possible?
His horse's name is Friday
What comes once in a minute, twice in a moment, but never in a thousand years?
letter M
I am a number. Multiply me by 2, then subtract 10, and you get 50. What number am I?
30
At a theme park, the paths are laid out around 16 squares of grass, as shown below.
. . . .
. . . .
. . . .
. . . .
Every square of grass is 100 metres by 100 metres. Litter bins have to be placed on the paths so that you never have to walk more than 100 metres along a path to reach a bin. What is the smallest number of bins that can be used?
A 4
B 8
C 12
D 13
C. 12
Before Mount Everest was discovered, what was the tallest mountain in the world?
Mount Everest (it was still the tallest, just not discovered yet)
What has hands but can’t clap?
clock
I start with the letter "P" and end with the letter "E," but I have thousands of letters inside. What am I?
A Post Office.
I’m a three-digit number. My tens digit is five more than my ones digit, and my hundreds digit is eight less than my tens digit. What number am I?
194
Delegates for a diplomatic summit must travel in taxis, each of which can take a maximum of 4, 5 or 6 people. When ordering taxis, it is not possible to specify the number of seats. About 60 delegates are expected, but certainly no more than 80. It is essential that there is space for every delegate. How many taxis should be ordered?
A 10
B 14
C 15
D 20
D
What has an eye but can’t see?
needle
What has a head, a tail, is brown, and has no legs?
a coin
The more of me you take, the more you leave behind. What am I?
Footsteps
Two people each eat half a pizza. How much pizza is left?
None
A plane crashes on the border of the U.S. and Canada. Where do they bury the survivors?
You don’t bury survivors
If you drop me, I’m sure to crack, but if you smile at me, I’ll smile back. What am I?
mirror
What begins with an “e” and only contains one letter?
envelop
I am an odd number. Take away one letter, and I become even. What am I?
Seven
The postcodes in Canada and the UK differ from similar systems in other countries (e.g. the US Zone Improvement Plan (ZIP) codes) because they include both letters and numbers. Codes are formed from two groups of characters, separated by a space. Each character is either a letter A–Z or a digit 0–9. We can describe the postcodes using a template, where we write: L for any single letter # for any single letter or single digit 9 for any single digit Optional characters are enclosed in brackets [ ]. Canadian codes follow a fixed pattern, whereas those in the UK have a more complicated structure to accommodate the pre-existing system of postal districts in major cities. A Canadian code has the template L9L 9L9. An example would be K9B 4U2. The UK codes are of the form L[L]9[#] 9LL. For example: N2 1AB, GL1 3EV, SW2A 6FF or CH45 5PQ.
Which one of the following would be sufficient but not necessary to determine that a given code is from the UK rather than from Canada?
A There are six characters (not counting the space).
B The last character of the first group is a letter.
C The second character is a letter.
D The last character is a letter.
C
What gets wetter the more it dries?
towel
What has to be broken before you can use it?
egg
I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?
echo
I am a number that’s doubled and then increased by my original value to get 30. What number am I?
10 (10 + 10 × 2 = 30)