BRAINTEASERS

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A grandmother, 2 mothers and

2 daughters went to the cafe.

They ordered one cup of

coffee each.

What was the total number of cups they ordered?

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Three cups of coffee, one for each person. The grandmother is also a mother and the mother is also a daughter.

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3, 5, 6, 9, and 12

Number jumbler

Find five numbers in the circle that add up to 35. None of the five numbers are used more than once.

Note: There are also combinations of fewer than five numbers that add up to 35, but those combinations don’t count. (Pun intended.)

You are on your way to visit your Grandma, who lives at the end of the valley. It's her birthday, and you want to give her the cakes you've made.

Between your house and her house, you have to cross 7 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.

How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?

SEE ANSWER

2
At each bridge you are required to give half of your cakes, and you receive one back. Which leaves you with 2 cakes after every bridge.

There was once a college that offered a class on probability applied to the real world.

The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it.

When everyone received the test it was a blank sheet of paper with a solitary question on it: "What is risk?"

Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!

What did he write?

The brilliant student wrote down:

"This."

And handed in the paper.

By doing this, the student demonstrated that he understood that having your grade based on one exam is risky.
Plus, putting just one word on such an important exam and hoping the professor understands what he means is risky in and of itself!

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There are three boxes, one contains only apples, one contains only oranges, and one contains both apples and oranges. The boxes have been incorrectly labeled such that no label identifies the actual contents of its box. Opening just one box, and without looking in the box, you take out one piece of fruit. By looking at the fruit, how can you immediately label all of the boxes correctly?

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So, you know all 3 boxes are incorrectly labeled.

Go to the box labeled “Apples + Oranges.” Since the label is wrong, it must have one or the other.

This is the box to take one piece of fruit from.

Whichever comes out is what that box contains. If you took out an apple, the box has only apples. If you took out an orange, vice versa.

Here’s where it gets tricky a bit tricky. But we’re almost done…

Let’s say you grabbed an apple. Move the “Apples” label over to that box. Now it’s correctly labeled.

You know the “Oranges” box is still labeled wrong (because all 3 were labeled wrong to start and you haven’t touched it). And you know it’s not “Apples”.

So it has to be “Apples + Oranges”.

The last box is “Oranges”.

The same process above would work if you had pulled out an orange at the start.

SEE ANSWER

SEE ANSWER

ANSWER IS 8

C = (L+R+B) - T

L(LEFTNUMBER), R(RIGHT NUMBER), T (TOP NUMBER), B (BOTTOM NUMBER), C (CENTER NUMBER)

I’m flat as a leaf and round as a ring. I have four eyes, yet can’t see a thing.

What am I?

Mark went to a restaurant for dinner last night. When he received his check he paid with a hundred dollar bill.

When the waiter returned his change, Mark received one of every denomination of currency under one hundred dollars.

What was the total cost of Mark’s meal?

SEE ANSWER

$13.59, the waiter returned to him a $50 bill, a $20 bill, a $10 bill, a $5 bill, a $1 bill, a quarter, a dime, a nickel, and a cent.

There is a room full of 100 politicians. Each one is either honest or a liar. You know two facts about these politicians:

1. At least one of them is honest.
2. If you pick any two politicians, at least one of them is a liar.

From this information, can you determine how many politicians are honest and how many are liars?

SEE ANSWER

One politician is honest and 99 are liars. We know from the facts at least one politician is honest. If more than one was honest you could potentially pick two politicians that would both be honest. However, fact number two tells us that at least one of the politicians would have to be a liar.

Placed above, I make greater things small. Placed beside I make small things great. In matters that count,

I always come first. Where others increase I keep them the same.

What am I?

SEE ANSWER

The number 1. If you put the number one above another number it turns it into a fraction. If you put it next to another number it makes the number larger. If you put things in order the number one comes first. If you multiply by one the number stays the same.

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A BUTTON

A wealthy man had an important flight the next day. Early that morning his security guard tells the man not to take the plane because he just had a dream that the plane would crash. The security guard then leaves, as it is the end of his shift.

The wealthy man took the advice of his security guard and traveled by train instead. Once he arrives at his destination, he learns the plane did in fact crash. He then fires his security guard.

Why did he fire the security guard?

If 3 cats can kill 3 rats in 3 minutes, how long will it take 100 cats to kill 100 rats?

You are driving in your car at night when magically three doors appear in front of you. A voice loudly tells you that behind the first door you will find diamonds. Behind the second door you will find gold and behind the third door you will find money. What door do you open first?

SEE ANSWER

Because the security guard was sleeping on his shift.

SEE ANSWER

3 MINUTES

SEE ANSWER

Your car door

There are five identical looking bags of gold coins. Four of the bags contain coins made of real gold and one of the bags contains coins made of fool’s gold.

All of the coins in all of the bags look identical. They are the same size, color and shape. The only difference is their weight. Real gold coins weigh 10 grams and coins made of fool’s gold weigh 11 grams.

You have an accurate scale that you can use only one time to determine which bag contains the fool’s gold. How do you do it?

SEE ANSWER

Take one coin from the first bag, two from the second bag, three from the third bag, four from the fourth bag, and five from the fifth bag. If the weight on the scale ends in 1 you know it’s the first bag, 2 the second, 3 the third, 4 fourth, and 5 the fifth bag.

A man is the owner of a winery who recently passed away. In his will, he left 21 barrels (seven of which are filled with wine, seven of which are half full, and seven of which are empty) to his three sons. However, the wine and barrels must be split, so that each son has the same number of full barrels, the same number of half-full barrels, and the same number of empty barrels. Note that there are no measuring devices handy. How can the barrels and wine be evenly divided?

SEE ANSWER

Two half-full barrels are dumped into one of the empty barrels. Two more half-full barrels are dumped into another one of the empty barrels. This results in nine full barrels, three half-full barrels, and nine empty barrels. Each son gets three full barrels, one half-full barrel, and three empty barrels.

What is broken every time it’s spoken?

SEE ANSWER

Silence. We often use the phrase “to break silence” when we mean there is noise or sound. Thus, every time someone speaks, we figuratively break the silence.

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Hot diggity dog

Charmaine is shopping for her big weekend barbecue. Her budget: $100. It costs $4 for a package of ten hot dogs and $3 for a package of eight buns. How many packages of each should she buy to maximize how many hot dogs she can serve? (Hint: She can have extra of either, but she won’t serve a hot dog without a bun.)

SEE ANSWER

The man did exactly as he said he would and wrote "your exact weight" on the paper.

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Charmaine should buy 13 packages of hot dogs and 16 packages of buns. She will spend exactly $100 and be able to serve 128 hot dogs.

As I was going to St. Ives,
I met a man with seven wives. Each wife had seven sacks, Each sack had seven cats, Each cat had seven kits. Kits, cats, sacks and wives, How many were going to St. Ives?

SEE ANSWER

One. Only I was going to St. Ives

First, think of the color of the clouds. Next, think of the color of snow. Now, think of the color of a bright full moon. Now answer quickly what do cows drink?

A man is sitting in a pub feeling rather poor. He sees the man next to him pull a wad of $50 bills out of his wallet.
He turns to the rich man and says to him,
"I have an amazing talent; I know almost every song that has ever existed."
The rich man laughs.
The poor man says, "I am willing to bet you all the money you have in your wallet that I can sing a genuine song with a lady's name of your choice in it."
The rich man laughs again and says, "OK, how about my daughter's name, Joanna Armstrong-Miller?"
The rich man goes home poor. The poor man goes home rich.

What song did he sing?

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"Happy Birthday"

This song can be sung with anyone's name in it.

A is father of C

and

D is son of B.

E is brother of A.

If C is sister of D,

How is B related to E?

SEE ANSWER

B is the sister-in-law of E

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water

Choose the correct sentence: “the yolk of the egg is white” or “the yolk of the egg are white.”

SEE ANSWER

Neither. Egg yolks are yellow, not white!

There is a word and six letters it contains

Take one away and twelve is what remains

What word is it?

SEE ANSWER

The word dozens. Take away the ”s” and it becomes dozen.

A man dressed in all black is walking down a country lane. Suddenly, a large black car without any lights on comes round the corner and screeches to a halt. How did the car know he was there?