The terms are successively divided by 12, 10, 8, 6 .... etc. So, 24 is wrong.

The terms are alternately multiples by 1.5 and divided by 3. However 18.5 does not satisfy it.

2nd = (1st + 1) : 3rd = (2nd + 2); 4th = (3rd + 3); 5th = (4th +4).

But 18 = 6th term not equal ? 5th + 5 = 14 + 5 = 19.

Sum of the digits in each number, except 324 is 10.

Number are all primes. The next prime is 43.

Numbers are alternately multiplied by 2 and increased by 3. So, the missing number = 61 x 2 = 122.

The number are cubes of primes i.e., 2³, 3³, 5³, 7³, 11³. Clearly, none is wrong.

Alternetly, we add 4 and double the next. So, 132 is wrong. It must be (68 x 2) i.e., 136.

The pattern is 1 x 3, 2 x 5, 3 x 7, 4 x 9, 5 x 11, 6 x 13, 7 x 15 etc.
So 70 is not correct.

Each number is a composite number except 11.