what does the below rebus means?

I make two people out of one. What am I?

What can you catch but never throw?

Replace the question mark with the correct number below.

Can you place six X (crosses) in below board without making three in a row in any way ?

What breaks yet never falls, and what falls yet never breaks?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99