Find out the wrong number in the given sequence of numbers.

36, 54, 18, 27, 9, 18.5, 4.5

Each number is twice the preceding one with 1 added or subtracted alternatively.

So, the next number is (2 x 261 + 1) = 523.

The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.

So, 40 is wrong.

Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.

Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16.

So, 9 is wrong.

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

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

Each of the numbers except 28, is a multiple of 3.

Let the given numbers be A, B, C, D, E, F, G.

Then, A, A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required numbers.

Clearly, 228 is wrong.