What occurs twice in a week, once in a year but never in a day?
Can you find out the missing number in the grid?
John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age. Can you find their ages?
A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child. Where's the father?
Check out the number list below and find what number comes next in the sequence. 111 , 113 , 117 , 119 , 123 , 137 , ?
What does the below image rebus riddle means ?
You need to remove two matchsticks to make the below equation true. Can you do it ?
John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?
How many letters are in the alphabet?
It comprises roots which nobody sees, Much taller than those trees, Up and up it goes, Still it never grows?
What makes this number unique: 8,549,176,320?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
