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 pattern is x2 + 1, where x = 1, 2, 3, 4, 5, 6, 7, 8 etc. But 64 is out of pattern
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.
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