Can you solve this amazing hard number series problem? 7, 8, 10, 12, 16, 18 ?
A sundial has the fewest moving parts of any timepiece. Which has the most?
Prove that twice of ten is the same as twice of eleven.
It's a protector. It sits on a bridge. One individual can see directly through it, while others wonder what it hides. What is it?
Look at the below sequence of letters and tell us what the next letter should be: O T T F F S S ?
Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?
A quarter is one-fourth of a dollar but Mr. John has changed the equation as below : DOLLAR * 4 = QUARTER Can you replace each letter with a digit to make the above solution correct?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?
"That Restaurant always remains crowded. This is the reason why nobody goes there". Can you find a flaw in this statement?
I am under you when I am whole. I shift above you if you remove the first letter. I come all around you if you remove the second as well. Can you tell me who I am?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
