Find the term which does not fit into the series. 240, 229, 222, 213, 208, 205, 204

Looking at the series 240, 229, 222, 213, 208, 205, 204, let's find the pattern: 240-229=11, 229-222=7, 222-213=9, 213-208=5, 208-205=3, 205-204=1. The differences are 11, 7, 9, 5, 3, 1. This doesn't follow a clear pattern. Let me check alternating terms: 240→222→208→204 gives -18, -14, -4 (not consistent). Or 229→213→205 gives -16, -8 (halving). The pattern might be based on digit manipulation or position. Actually, looking at it differently: subtract consecutive digits? No. Let's try: 240, 229 (240-11), 222 (229-7), 213 (222-9), 208 (213-5), 205 (208-3), 204 (205-1). The subtractions are 11,7,9,5,3,1. These are odd numbers in descending order but 7,9,5 is not descending (should be 11,9,7,5,3,1). The term 222 breaking this pattern (after 229 should be 220 if pattern held). But actually 229-222=7 and the sequence of subtractions would be 11,9,7,5,3,1 if perfect. We have 11,7,9,5,3,1. So 7 and 9 are swapped - making 222 the odd one (should have come after 9 subtraction from 229, giving 220). Therefore 222 doesn't fit the pattern.