If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Replace the question mark with the number below given a simple math problem.

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

I travel all around the world but always stay in the corner. What am I?

how come the second man dies?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

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

How Come ??