What makes this number unique: 8,549,176,320?

What is wrong in the below Picture?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

How many triangles are there on the puzzle below?

Who has married many women but was never married?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Can you solve the photo plexer logic ?

You can see it everyday, But cannot touch it at will. What is it?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?