Is every nonogram solvable?

Yes, most nonograms are line solvable. But that is just because most of them are designed in such a way that a human can solve them. There are also exampl...

What are pairs of numbers?

Author(s): There are two numbers whose sum is equal to the difference of their squares, and if the sum of the squares of the two numbers be subtracted fro...

Which tile finish is best?

The pros. Better grip – if you’re tiling floors, then opting for a matt finish can be the way to go for better grip underfoot, which is why they’re often ...

What is the hardest geometry?

The problem is known as Langley’s Adventitious Angles and was posed in 1922. It is also known as the hardest easy geometry problem because it can be solve...

What is 2 digit number?

2-digit numbers are the numbers that have two digits and they start from the number 10 and end on the number 99. They cannot start from zero because in th...