Math riddles


Number one

How do you make the number one disappear by adding to it?
Add the letter 'G' and it becomes Gone.
95.26 %
54 votes


3 Sacks of 30 Coconuts

An intelligent trader travels from one place to another with 3 sacks having 30 coconuts each. No sack can hold more than 30 coconuts. On the way, he passes 30 check points. At each check point, he has to give one coconut for every sack he is carrying. What is the maximum number of coconuts that he can have with him at the end of his journey?
He will have 25 coconuts with him at the end. The trick is to reduce the number of sacks as you pass checkpoints. The first 10 checkpoints require 3 coconuts each, which empties his first sack. The next 15 checkpoints require 2 coconuts each, which will empty his second stack. Now, he is left with 1 sack and 5 more checkpoints. So, the 5 checkpoints will take 1 coconut each. Therefore, he will be left with 25 coconuts.
93.70 %
40 votes


Appleland to Bananaville

You have been given the task of transporting 3,000 apples 1,000 miles from Appleland to Bananaville. Your truck can carry 1,000 apples at a time. Every time you travel a mile towards Bananaville you must pay a tax of 1 apple but you pay nothing when going in the other direction (towards Appleland). What is highest number of apples you can get to Bananaville?
833 apples. Step one: First you want to make 3 trips of 1,000 apples 333 miles. You will be left with 2,001 apples and 667 miles to go. Step two: Next you want to take 2 trips of 1,000 apples 500 miles. You will be left with 1,000 apples and 167 miles to go (you have to leave an apple behind). Step three: Finally, you travel the last 167 miles with one load of 1,000 apples and are left with 833 apples in Bananaville.
94.48 %
46 votes


An electric train

If an electric train is going east at 60 miles an hour and there is a strong westerly wind, which way does the smoke from the train drift?
here is no smoke coming from electric trains.
91.77 %
30 votes


Number 7

How do you make the number 7 an even number without addition, subtraction, multiplication, or division?
Drop the "S".
92.86 %
35 votes


Take 2 from 5

How can you take 2 from 5 and leave 4?
F I V E. Remove the 2 letters F and E from five and you have IV.
93.70 %
40 votes


Subtract 5 from 25

How many times can you subtract 5 from 25?
Just once, because after you subtract anything from it, it's not 25 anymore.
93.55 %
39 votes


Number 45

Can you write number 45 using only the number 4?
91.77 %
30 votes

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