betting

Q: Is it okay to play online poker not with real money. Me and my brothers, cousins like to play cards we don't bet just play. Or we shouldn't?

Q: Is trading halal? Like the website I am using is IQ Option. Where you bet the price on 4th decimal of the rate.

Q:

1. If I open a snooker shop, will that money be halal or haram as I know in Islam betting is haram but in this case we are not telling the players who will come to my shop to play snooker that you have to bet but more then 90% of the boys that play bet, or both of them agree to pay money. So is it still haram or halal?

2. If I wrote on a wall that betting is not allowed here then will it be enough to make snooker shop money halal?

Q: Me and my friend were discussing about marks of a certain exam and my friend said "I won't get more than 20 marks". I said to him "You will get more than 20 marks". He said to me "If I get more than 20 marks I will give you a treat". When results came out he scored more than 20 marks. Is it permissible for me to take a treat from my friend. Is it counted as betting/gambling?

Q: In Islam, is it permissible to use money which is gained from gambling activities such as the lottery, horse racing, betting, etc.?