Which is not formed by multiplying two consecutive primes?

Which term is wrong in the following series? 8, 13, 21, 32, 47, 63, 83

Which number is unsuitable in the following series? 5, 3, 6, 10, 9, 12, 17, 15, 18, 23

Which fraction comes next in the sequence? 1/2, 3/4, 5/8, 7/16, .......

Which number will come in the place of question mark (?) in the table given below?

What is the sum of next two terms in the following sequence? 2, 5, 13, 29, ___, ___