What number comes next in the series? 5 15 5 18 5 24 14 20 _
Which tank will fill first?
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?
I am a white box having no key or lid. Yet there is a golden treasure inside it. What Am I?
I look at you, you look at me, I raise my right, you raise your left. What am I?
A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result. Can you find how bias is the floor in this case?
Solve the alphametic puzzle by replacing the alphabet with the number. S T O R M + S O L E S ========= T O W E L =========
Can you find the thief by just looking at the picture below?
Count the number of triangles in the picture below:
You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.
When we see 2 but call 10?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
