Math puzzle: uncover the magic of numbers

08.08.2024   BTV Trần Diệu
Đố vui toán học: Thám hiểu sự kỳ diệu của các con số

One of the best ways to make mathematical concepts more relatable and easier for children to understand is to connect them to everyday situations, through math riddles. When children can see how numbers play an important role in the world around them, they can grasp the concepts quickly, while also being more motivated to learn.

Fun math riddles stimulate creative thinking and imagination

People may think math is dry and full of numbers, but in children's eyes, math is as colorful as other subjects. The fun math riddles below don’t rely on many mathematical rules; instead, they encourage children to think from multiple angles, thereby making them love math even more.

1. Q: Why is the math book so sad?

A: Because it has too many problems!

→ Explanation: In a math book, there are many problems that need to be posed before solving.

2. Q: Why is the circle the hottest shape in geometry?

A: Because it has 360 degrees.

→ Explanation: In geometry, 360 degrees is the full angle.

3. Q: What does the number 0 think when it sees the number 8?

A: What a beautiful belt!

→ Explanation: The number 8 looks like the number 0 with a belt in the middle.

4. Q: What is the most distinctive property of odd numbers in mathematics?

A: They are never divisible by 2.

5. Q: How can soccer fans know the score will be 0-0 even before the match starts?

A: Because the score is always 0-0 at the start of the game.

6. Q: Nam adds 5 hours to 9 in the morning and ends up at 2 in the afternoon! Do you know why?

A: Nam adds 5 hours to 9 o’clock in the morning and ends up at 2 o’clock in the afternoon!

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2 PM means 14:00

7. Q: Today Kim buys a rooster and the seller tells Kim that every day there will be 2 eggs. How many eggs will Kim have after one week?

A: None. Because a rooster cannot lay eggs.

8. Q: Which is heavier, 1 kg of iron or 1 kg of cotton?

A: They weigh the same.

9. Q: A rainbow has 7 colors; how many colors would 3 rainbows have?

A: Still 7 colors.

Engaging math riddles through real-life situations

- If A gives a duck 9,000 dong, a spider 36,000 dong, and a bee 27,000 dong, how much money would A give to a cat?

A: 18,000 dong.

→ Explanation: The amount depends on the number of legs of the animal; each leg costs 4,500 dong.

- 1 grandfather, 2 fathers and 2 sons go to buy tickets. How many tickets do they buy in total?

A: 3 tickets (Including: grandfather, father, and son. The grandfather is the father of the father. The father is the son of the grandfather.)

- A woman goes out to buy bananas. All but 3 bananas are spoiled on the way. How many good bananas does she have now?

A: 3! (All are spoiled except the three remaining.)

- If there are 10 apples on the table and Lan takes 2 apples. How many apples does Lan have in total?

A: 2 apples.

- How can you arrange the number 8 to make 1000 in a math equation?

A: 888 + 88 + 8 + 8 + 8 = 1000!

- What do you add between the numbers 4 and 5 to get a result greater than 4 and less than 5?

A: A decimal point! 4.5 is greater than four and less than five.

- If Lan is 6 years old and Hoa is 3 years old, how old is Hoa when Lan is 60?

A: Hoa is 57 years old because Hoa is only 3 years younger than Lan.

- Tuan works at a sheep farm. When he cages one sheep in a cage, he has one sheep left over. If he cages two sheep in the same cage, he has one cage left over. So how many sheep and how many cages does Tuan have?

A: Three cages and four sheep.

do-vui-toan-hoc-2
Lock the sheep to determine the number of cages

- In a class there are a total of 50 students and you have to shake hands with each one. How many handshakes do you have to perform?

A: 49. Because the 50th person is you.

- Thu counts 10 houses on the right on the way to school and counts 10 houses on the left on the way home along the same route. How many houses did Thu count in total?

A: 10. Because the houses on the right will be on the left when Thu goes home.

Engaging math riddles about placing operations

  1. A nobleman walks into a bakery and asks for:

“Please prepare for me 9 cakes, but they must be placed into only 4 boxes, and each box may contain exactly 3 cakes!”

While the baker stood puzzled, a boy named Gauss — who would become the famous German mathematician later — ran out:

“Please rest assured, your cakes will be arranged exactly as requested.”

Can you guess how Gauss did it?

Answer: Arrange 9 cakes equally into 3 small boxes (each box has 3 cakes). Then place all 3 boxes into a larger box. Thus they end up with a total of 4 boxes that still satisfy the requirement to hold all 9 cakes.

  1. There is 1 box of oranges containing 4 oranges. How can you divide them evenly among the 4 people and still have 1 orange in the box?

A: Take 3 oranges from the box and divide them evenly among the 3. The fourth person will receive the box and the remaining orange.

  1. There is a bridge with a load of 10 tons. A truck carrying goods weighs 8 tons, and carries an additional 4 tons of goods, totaling 12 tons. How can the driver cross the bridge without unloading any cargo from the truck?

A: The driver gets off the truck and crosses the bridge as usual.

  1. Two ducks go in front of two ducks, two ducks go behind two ducks, two ducks go between two ducks. How many ducks are there in total?

A: 4 ducks

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Can you find the right answer to this math riddle?

Mathematics is vast and endless, and sometimes a new formula or a difficult problem that a child hasn’t yet solved can easily cause them to give up and lose interest in math. That is why parents should help children learn through math riddles, helping them bid farewell to the notions of “hard” or “boring.” When math becomes engaging and interesting, children will not hesitate to explore and will become outstanding.

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