You Think You Know This
Using eight number “8”s, how can you make the result equal 1000?
8 8 8 8 8 8 8 8
8+8+8+88+888
(8888-888)/8
Alexander goes to an internet café to open a membership card, which costs $20. He doesn’t have exact change, so he gives Hazael a $50 bill. Hazael gives him $30 in change. Later, Alexander finds a $20 bill and gives it to Hazael, and Hazael then returns the original $50 bill to him. Who made money, and how much?
What is your favorite subject?
What date is today?
Your choice ~
12/23/2025
John and Jhon played 9 chess games in one day. There were no draws, and both of them won the same number of games. How is this possible?
The 9 games were not all played against each other.
A bicycle travels north at 80 km/h. There is an east wind blowing at 20 km/h. Which direction does the bicycle’s smoke blow?
A bicycle has no smoke.
Sabira is 5 years old, Raima is 3 years old, and Syeda has one year difference to both of them. How old is Syeda?
4 years old
There are two bridges over the Yellow River, one high and one low. Both bridges were hit by floods three times. The high bridge was flooded three times, but the low bridge was flooded only once. Why?
After each flood, the high bridge reappeared, while the low bridge stayed submerged.
Jayden failed math test by 6 points and didn’t pass. Ivan also failed math by 6 points and didn’t pass, but Jayden and Ivan have different scores. Why?
Jayden: 54 > 54 + 6
Ivan: 0 > 60
A 2-meter rope ties a small dog to a tree. The dog sees a bone on the ground 2.1 meters away but cannot reach it. What should the dog do to get the bone?
The dog should turn around and use its hind legs to grab the bone.
Dylan brings $100 to buy a shirt that costs $75, but the Ibrahim only gives him $5 in change. Why?
Because Dylan only gave the Ibrahim $80.
Divide 18 evenly into two parts. You cannot get 9. What can you get instead?
10 (by cutting horizontally through the middle)
There are 9 eggs in total. You break 3 eggs, boil 3 eggs, and eat 3 eggs. How many eggs are left?
6 eggs.
Three children eat three pancakes in 3 minutes. How long does it take for ninety children to eat ninety pancakes?
3 minutes
Which month has 28 days?
Every month
There is a well that is 7 meters deep. A snail climbs up 3 meters during the day and slips down 2 meters at night. How many days will it take for the snail to climb out of the well?
5 days
Smoker A smokes 50 cigarettes a day, while Smoker B smokes 10 cigarettes a day. After 5 years, Smoker B has smoked more cigarettes than Smoker A. Why?
Smoker A died early from smoking too much, so Smoker B ended up smoking more cigarettes over time.
On Sergio’s first day of pre-kindergarten, he had never studied mathematics, yet the teacher, Mr. Anthony, praised his math level as “counting from one to two.” Why?
Because he can only count from one to two.
A father and mother have four daughters. Each daughter has one brother. How many people are there in the family?
7 people (four daughters, one brother, and the parents).
Along a 40-meter road, colorful flags are placed on both sides. One flag is placed every 5 meters. How many flags are needed in total?
18 flags
Five beats zero, zero beats two, and two beats five. Do you know what is going on?
This is the game “Rock–Paper–Scissors”.
There are 12 lit candles on a table. A gust of wind blows out 3 of them, then another gust blows out 2 more. How many candles are left on the table?
5 candles (the blown-out ones melt away).
Alivia spends $19 to buy a toy and sells it for $20. She feels this is not profitable, so she buys it again for $21 and sells it for $22. How much money did she make in total?
2
There is a type of bacteria that doubles after 1 minute, then doubles after another minute to become four, and continues doubling this way. Starting with one bacterium, it takes 1 hour to completely fill a bottle. If two bacteria are put into the bottle at the beginning, how long will it take to fill the bottle?
59 minutes
A pool is 4 meters long, 3 meters wide, and 2 meters deep. How many cubic meters of concrete are needed?
None. The pool is empty and has no concrete.
If you cut off one corner of a square table, how many corners does it have now?
5 corners
A dress is bought for $50 and sold for $70. The customer pays with a $100 fake bill. How much money does the shop owner lose?
$80
Rishabh’s birthday is December 30th. Which year’s December 30 is it?
Every year’s December 30th.
News reported in a newspaper may not be 100% true, but what information is always correct?
The date (year, month, and day).
There are 100 apples and 100 people eating. Each adult eats 3 apples, and each child eats 1 apple. How many adults and how many children are there so that all the apples are eaten exactly?
Adults: 25
Children: 75
Using the digit 3 three times, what is the largest number that can be formed?
3^33
Can you use 3 and chopsticks to form a number that is greater than 3 but less than 4?
pi
Please evenly place 9 horses into 10 horse pens so that each pen has the same number of horses. How can this be done?
Put all 9 horses into one pen, then build 9 more pens around it.
Six horses pull a large cart and travel 6 miles.
How many miles does each horse run?
How many miles do the six horses run in total?
Each horse runs 6 miles;
Together, they run 36 miles
Eric and Nathaniel need to share five apples. How can this be divided most fairly?
Make apple juice and split it evenly.
What number increases by half when turned upside down?
6