Krish is 45 years old and his mother Crishtina is 73 years old. Can you find out how many years ago, his mother was three times his age?
What occurs twice in a week, once in a year but never in a day?
Find the Next Number in the Sequence 2 9 3 1 8 4 3 6 5 7 ?
What numbers should go on the bottom line? 3 6 9 15 8 2 10 12 11 8 19 27 19 10 29 39 ? ? ? ?
Decode the below four famous ciphers: 8P of the SS 1M of the E 1S of the SS 60M in 1H
You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?
What always comes into a house through the keyhole?
The following alphametic has only one solution. Can you find it? ENLIST + SILENT + LISTEN = ANAGRAM PS: You may start the number from 0.
A number can be multiplied by multiple of nine i.e 9 18 27 36 45 ... and the resulting number consist of only one digit. Can you identify the number ?
Alex opened 24 presents Jonah opened 8 presents Clara opened 1 present Can you find out how many presents were opened by Candy?
Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
