How is a fly different from a mosquito?
Can you find the odd number in the following five choices? 1) 482636 2) 259807 3) 865195 4) 104739 5) 391744
A network of 20 x 10 squares is given to you. Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?
I come in different shapes and sizes. Parts of me are curved, other parts are straight. You can put me anywhere you like, but there is only one right place for me. What am I?
If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?
There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across. How?
Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?
Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!
When I got four, I have it none. When I got two, I have it some. When I got none, I have it all. What is it?
Can you start the fire using two pieces of wood?
If 21x = 79x, what is the value of x?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
