What does the below rebus riddle means?

Through your logical capabilities, can you make 7 an even?

I have a sore throat and a severe headache. I have four tablets with me that are identical to each other and they do not have any cover on them. There is no way I can identify which tablet serves what purpose. The only thing that I know is that two of these four tablets are for the throat and the remaining two are for the headache. To treat my condition, I must take 1 of each. What will I do now?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

Who is that with a neck and no head, two arms and no hands? What is it?

Can you place three balls such that the equation shown in the picture holds true?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

81 x 9 = 801. What must you do to make the this equation true?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?