Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Find the hidden tiger in the given optical illusion ?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

What do you call a fish without an eye?

I have no life, but I can die. What am I?

Count the number of triangles in the picture below:

What kind of band never plays music?

how come the second man dies?