Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true. * * x * ===== * * *
Can you arrange four 9's and use at most 2 math symbols, to make the total 100?
What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?
Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols. 9 # 8 # 7 # 6 # 5 # 4 = 91
Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?
Can you write down eight eights so that they add up to one thousand?
What is the largest number you can write with just 3 digits?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?
What is next number in the pattern below: 131 517 192 123 ?
Replace the (?) with the correct mathematical signs to make the expression equal to 59. 18 ? 12 ? 4 ? 5 = 59
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
