Logic
I have 10 red socks and 10 blue socks in a drawer. How many socks must I take out to ensure that I have at least one matching pair?
Three
On the first day of Christmas, you receive 1 gift. On the second day, you receive two. Assuming the pattern continues, how many gifts have you received after 6 days?
21
A plane crashes on the border of the U.S. and Canada. Where do they bury the survivors?
You do not bury survivors.
What is the value of x in the equation 5x=10?
x=2
What is the name of a shape with 6 sides?
Hexagon
Logically, what is the next letter in the sequence
b, c, d, f, g, h, ...
j
Five people were eating apples, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order?
CABDE
How much dirt is in a hole that is 4 metres long, 3 metres wide and 2 metres deep?
Zero
What is 10% of 80?
8
What is the smallest prime number?
2
You’re at a fork in the road in which one direction leads to the City of Lies (where everyone always lies) and the other to the City of Truth (where everyone always tells the truth). There’s a person at the fork who lives in one of the cities, but you’re not sure which one. What question could you ask the person to find out which road leads to the City of Truth?
"Which way do you live?"
There are several books on a bookshelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
Nine
What can be told, made, cracked and played?
A joke
If 2x-4=10, what is x?
x=7
What is the only number that has the same number of letters as its value?
Four
If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?
Cheaper to take two friends at same time, as you'd only buy 3 tickets instead of 4
Two dogs are 40 meters apart and running towards each other, each moving at a speed of 10 m/s. If a fly flies between them at 30 m/s, touching one dog's nose before turning around and touching the other dog's nose, how many meters does the fly fly before it is crushed by the dogs?
60 metres as the dogs will collide in 2 seconds.
If you drop me, I will crack. If you smile at me, I will smile back. What am I?
A mirror
What is 5.4 x 0.2?
1.08
6 is a perfect number, because its proper factors are 1,2,3 and
1+2+3 =6. What is the next perfect number?
28, because the factors are 1,2,4,7,14 and 1+2+4+7+14=28
Susan and Lisa decided to play tennis against each other. They bet $1 on each game they played. Susan won three bets and Lisa won $5. How many games did they play?
11
If you take the first two letters off this 5-letter word, you get something that is all around you. If you take the first letter off this word, it is now on top of you.
Chair
What is seen in the middle of March and April, that cannot be seen at the start of end of either month?
The letter r
A cactus is 98% water and weighs 50 kg. The cactus now absorbs more water and is 99% water. What is the weight of the cactus?
100 kg
Which ancient Greek mathematician is known for his work on the concept of limits and was one of the first to rigorously formulate calculus?
Archimedes