Replace the (?) with the correct mathematical signs to make the expression equal to 59.
18 ? 12 ? 4 ? 5 = 59
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
How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?
Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?
Find out the missing number in the picture attached:
On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.
Can you tell me how many 20-paisa and 25-paisa he got?
In the image below, can you find the value of an angle(y)
Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.
There is a square of a particular number which when doubled, becomes 7 more than its quarter.
Can you find the number?
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.