1. 1955, because Punkt-vor-Strich
2. X =0.5 because minus times minus equals plus and minus times plus equals minus
3. false because 10x3 != 150

tataa I am a math god;-)

PS: You should make it a rule to send the answer to you via a money transfer. The trick is that when you add a # before the message which you can send with the money, it will b invisible to others. See here -> https://steemit.com/steemit/@jwolf/can-you-send-a-secret-memo-on-steemit-yes-you-can