Note: The pattern is `1^2, 1^2, + 2^2, 1^2 + 2^2 + 3^2, 1^2 + 2^2 + 3^2 + 4^2,` `1^2 + 2^2 + 3^2 + 4^2 + 5^2, 1^2 + 2^2 + 3^2 + 4^2 + 5^2 + 6^2.` But 50 is not of this pattern.

Note: In Each number except `427`the middle digit is sum of the other two.

Note: In each number except `751`, the difference of third and first digit is the middle one.

Note: In each number except `383,` the product of first and third digits is the middle one.

Note: Not available

Note: The pattern is `x^2 + 3,` where `x = 4, 5, 6, 7, 8, 9,` etc. But, `102` is out of pattern

Note: Sum of the digits in each number, except `324` is `10`

Note: Pattern is `1st xx 2nd = 3rd ; 2nd xx 3rd = 4th ; 3rd xx 4th = 5th.`

Note: Not available

Note: The terms are alternately multiplied by `1.5` and divided by `3`.Hour `18.5` does not satisfy it.