Math riddles

Math-riddlesNumbers are something we learn as children. These are important since many of the world’s questions can actually answered with math. Math is very important in our world, without it we would not have such a great society we have. For all those who love math, I would like to present these amazing math riddles. What are you waiting for, go ahead and try to solve them.

Dan deals himself and his friend Mark some cards from a deck of cards (not the same amount). If Mark gives Dan some cards Dan will have 4 times as many cards as Mark If Dan gives Mark the same number of cards he will have 3 times as many cards as Mark.
Dan has 31 cards, Mark has 9, and they trade 1 card.
What did one math book say to the other?
Don’t bother me I’ve got my own problems!
11 cartons total
7 large boxes (7 * 8 = 56 boxes)
4 small boxes (4 10 = 40 boxes
11 total cartons and 96 boxes.
9 books.
What is the smallest three digit palindrome divisible by 18? Can you solve this without a brute force examination of possibilities?
The answer for this math riddle is 252.
4. Once you grab 4 you will definitely have 2 of the same color.
He can propose a plan that he gets 98 pieces of gold, the 3rd pirate gets 1 piece, and the 5th pirate gets 1 as well.
If there were just 2 pirates the younger pirate would definitely deny the plan so he could get all of the gold.
If there were 3 pirates the first pirate can offer the second pirate 1 piece of gold and take the rest himself because the second pirate wouldn’t get anything if he has to propose a plan himself.
If there were 4 pirates the first pirate could take 99 for himself and offer 1 to the youngest pirate. They would both agree. If the youngest disagrees then he won’t get any gold in the next plan.
So when there are 5 pirates it is in the interest of the 3rd and 5th pirate to accept 1 piece, because if they don’t they won’t get anything in the next plan.

Can you solve all the Math riddles

Using only addition, how can you add eight 8's to get the number 1,000?
888 +88 +8 +8 +8 =1,000
They both weigh a ton.
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 there going to St. Ives?
The answer is 1. The only person that is assumed to be going to St. Ives is the narrator. But the following answers can be found if looking at the question in other ambiguous ways: 2802, 2800, 0, 2, 2753, 7, and 9.
1, 2, and 3.
There are 100 passengers boarding a 100 passenger airplane. When passenger 1 gets onto the plane, he is dissoriented, so he randomly picks a seat. Each of the remaining passengers (2, 3, 4, etc.) get onto the plane and take their seat if it is available or picks one of the remaining seats at random if it is not.
What is the chance that the last passenger (passenger 100) will get his seat?
There is a 50 percent chance.
When the last passenger gets on seats 2 – 99 will be taken for sure. Each of these passengers would take their seats if they were available, so the only seat remaining at the end would be 1 or 100. So there is a 50 percent chance that passenger 100 would get seat 100.
What does Dan do to have the best chance of getting home with the money?
What's the angle between minute hand and hour hand at a quarter past three?
7.5 degrees.The minute hand is pointing directly at the ‘3’. The hour hand is 1/4 of the way between the ‘3’ and ‘4’. Since there are 12 numbers the angle between each number is 30 degrees. So the angle between the hands are 30 degrees * 1/4 = 7.5 degrees.
There are two ropes that both take exactly 1 hour to burn from end to end. You are unable to cut the rope. How can you burn the two ropes in a total of 45 minutes?
Start one of the ropes on fire from both ends and the other one from one end. After a half an hour one rope will be completely burnt and the other will be half burnt. At this point you light the final rope from the unlit side and it will take 15 minutes for the remaining half of the rope to burn, for a total of 45 minutes.
There are 100 coins scattered in a dark room. 90 have heads facing up and 10 are facing tails up. You cannot tell which coins are which. How do you sort the coins into two piles that contain the same number of tails up coins?
The piles don’t need to be the same size, so make a pile of 10 coins and a pile of 90 coins, flip all of the ten coins and it is guaranteed that the piles have the same number of tails.
Replace the question mark with mathematical symbols to make this equation work:
7 ? 7 ? 77 ? 7 ? 7 = 497
7 + 77 * 7 – 7 * 7 = 497.
A rat is placed at the beginning of a maze and must make it to the end. There are four paths at the start that he has an equal chance of taking: path A takes 5 minutes and leads to the end, path B takes 8 minutes and leads to the start, path C takes 3 minutes and leads to the end, and path D takes 2 minutes and leads to the start.
What is the expected amount of time it will take for the rat to finish the maze?
9 minutes. Each path has an equal chance of occurring and if B or D are chosen they will just add 8 or 2 minutes to the time because the rat must restart the maze: time = (1/4)*5 + (1/4)*(8 + time) + (1/4)*(3) + (1/4)*(2 + time). Time = 9 minutes.

Many more Math riddles

I know a number which when multiplied by multiple of 9 i.e 9 18 27 36 45 ... the output consist of number containing only one digit.
Can you identify the number ?
12345679 × 9 = 111111111 (only 1s)
12345679 × 18 = 222222222 (only 2s)
12345679 × 27 = 333333333 (only 3s)
12345679 × 36 = 444444444 (only 4s)
12345679 × 45 = 555555555 (only 5s)
5. He makes 4 cigarettes with the 16 butts. Then he smokes them and has 4 more butts to make another cigarette.
What do you get if you add 3 to 300 five times?
303, 303, 303, 303, 303.
You took three apples so obviously you have three.
If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
The answer is PIZZA (PI x Z x Z x A)
Where is the best place for him to sit?
In the back. The train will be accelerating so it will be going faster when the back of the train enters the tunnel so a person in the back will spend less time in the tunnel.
When Robert was six years old he hammered a nail into his favorite tree to mark his height.
Five years later at age eleven , Robert returned to see how much higher the nail was.
John has been hired to paint the numbers 1 through 100 on 100 apartments.
How many times with he have to paint 8?
5+3+2 = 151022
9+2+4 = 183652
8+6+3 = 482466
5+4+5 = 202541
7+2+5 = ?
You have a flashlight that takes 2 working batteries. You have 8 batteries but only 4 of them work.
What is the fewest number of pairs you need to test to guarantee you can get the flashlight on?
7. If you break the batteries into 3 groups: Two groups of 3 and one group of 2. By doing this you guarantee that one of the groups has 2 working batteries. Both of the groups of 3 have 3 possible combinations of 2 batteries and the group of 2 only has 1 combination. So, 3 + 3 + 1 = 7 tries at most to find two working batteries.
Replace the '?' by any mathematical symbol to make the expression equal to 99.
18 ? 12 ? 2 ? 3 = 111.
18 x 12 ÷ 2 + 3 = 111.
What number do you get when you multiply all of the numbers on a telephone's number pad?
The number 0.
Can you arrange four nines to make it equal to 100.
99+9/9 = 100.
50 percent.
44 and 66.
The glass is a right cylinder.
Tip the glass of water until the water reaches the rim of the glass and if the water lines up perfectly with the bottom rim of the glass, it is half full.
Large number of people went to an party and they decided to make some fun at the bar.
The first person asks the barman for half a pint of beer.
The second person asks for a quarter pint of beer
The third person asks for one-eighth of beer and so on.
How many pints of beer will the barman need to fulfill the people need of beer ?
Just 1.
What is 2+2x2=?
If your answer is 8, it’s wrong. The real answer is 6. You always multiply first. Try it out on a calculator or your phone.
You have two books. One of them is upside-down and the other is rotated so the top of the book is facing you.
What is the sum of the first page in each book?
2. The first page in each book is page number 1 regardless of how they are oriented and 1 + 1 = 2.

Want more math riddles?

Good for you, you made it to the end. Did you solve all of the math riddles? If so great job. I hope you like this category. I will of course add more math riddles if there is demand for them. In the meantime, I would like to direct your attention to all the other categories with riddles we have on this page. We also include jokes, quotes, insults and pickup lines. Have a good day.

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