This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Dr Doom invited a group of puzzle fanatics to a party which was oriented toward having puzzle-oriented games. At night, he introduced the guests to a 'unique riddle'. A prize was offered to the one who solved it first.

The guests included six people named Tom Paul, Fox Obama, Jeremy Reener, Alex Murphy, Prim Pastor, and Ellen Page. The winner of the 'unique riddle' contest was to be announced after the dinner. So Dr. Doom stood up and started the announcement:

'Okay now everybody!'
'The winner of�'
'The Hardest Riddle Ever Event'

But before he could complete it, the light went out and his voice was not heard without the mic by anyone. But they already knew who the winner was. Can you deduce the name of the winner?

What English word has three consecutive double letters?

In which direction should the missing arrow point?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

What is full of holes but still holds water?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?