# Short math riddles

## 4 gallon of water

How to measure exactly 4 gallon of water from 3 gallon and 5 gallon jars, given, you have unlimited water supply from a running tap.
Step 1. Fill 3 gallon jar with water. ( 5p – 0, 3p – 3) Step 2. Pour all its water into 5 gallon jar. (5p – 3, 3p – 0) Step 3. Fill 3 gallon jar again. ( 5p – 3, 3p – 3) Step 4. Pour its water into 5 gallon jar untill it is full. Now you will have exactly 1 gallon water remaining in 3 gallon jar. (5p – 5, 3p – 1) Step 5. Empty 5 gallon jar, pour 1 gallon water from 3 gallon jar into it. Now 5 gallon jar has exactly 1 gallon of water. (5p – 1, 3p – 0) Step 6. Fill 3 gallon jar again and pour all its water into 5 gallon jar, thus 5 gallon jar will have exactly 4 gallon of water. (5p – 4, 3p – 0)
74.97 %

## The smallest number

Which is the smallest number that you can write using all the vowels exactly once?
fIvE thOUsAnd (5000).
74.96 %

## Three positive whole numbers

Find three positive whole numbers that have the same answer added together or when multiplied together.
1, 2 & 3. 1 x 2 x 3 = 6 and 1 + 2 + 3 = 6
74.73 %

## 2 numbers

Divide 110 into two parts so that one will be 150 percent of the other. What are the 2 numbers?
44 and 66.
74.29 %

## How many times do a clock's hands overlap

How many times do a clock's hands overlap in a day?
22 times. am 12:00 1:05 2:11 3:16 4:22 5:27 6:33 7:38 8:44 9:49 10:55 pm 12:00 1:05 2:11 3:16 4:22 5:27 6:33 7:38 8:44 9:49 10:55
74.29 %

## Six letters

There is a word and six letters it contains. Take one away and twelve is what remains. What word is it?
Dozens.
74.18 %

## Volume of the pizza

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
pi * z * z * a
74.04 %

## 100

Can you arrange four 9's and use of at most 2 math symbols, make the total be 100?
99 / .99 or 99 + 9/9
73.89 %

## Half of two plus two

Is half of two plus two equal to two or three?
Three. It seems that it could almost be either, but if you follow the mathematical orders of operation, division is performed before addition. So... half of two is one. Then add two, and the answer is three.
73.80 %