The terms are successively divided by 12, 10, 8, 6 .... etc. So, 24 is wrong.
The difference between two successive terms from the beginning are 7, 5, 7, 5, 7, 5. So, 40 is wrong.
The number are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13 . So, 150 is wrong.
The number are square of odd natural numbers, starting from 5 up to 15. So, 36 is wrong.
Add 12, 22, 32, 42, 52,62 .
So, 91 is wrong.
In each number except 383, the product of first and third digit is the middle one.
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.
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