the hardest math test ever

can you aswer these tough questions?

1 what is 20-4
2 you pick apples with a friend. you pick 10 alltogether. you take 3 of them. how many do you have left?
3 there is 6 sheep. a person comes and takes all but two. how many are left?
4 how much carrots did i eat today?
5 what is wrong with this sentence: "hi, my name is bob"
6 if i put on 12 different socks on, how much pairs of socks did i put on
7 if you were presedent, how many people would you be rulling over