Using Only Five 5's and any mathematical operator make sum as 37
If one and a half boys, eat one and a half burgers in one and a half hours. How many burgers can 9 boys eat in 3 hours?
Look at this sequence from top to bottom. What is the next number in the sequence? 1 11 21 1211 111221 312211
In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable
You need to arrange three 7 and mathematical symbols to form number 1?
Can you find out the remainder when 3^300 is divided by 5?
I throw two dice simultaneously. What is the probability of getting a sum as 9 of the two numbers shown?
Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3. (You can use one number only once)
Can you find out which number multiplied by itself will give the output as 12345678987654321?
Check out the number list below and find what number comes next in the sequence. 111 , 113 , 117 , 119 , 123 , 137 , ?
Solve the mathematical equation in the picture below.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
