If the answer is supposed to be logically rigorous, o1 is incomplete for the reason you say.
If I was treating this as a lateral thinking puzzle (does anyone still do those for interview questions?) rather than a sensible request, I'd give numbers in a non-Latin character set, at which point it's easy: 一三五七九
(But even this only works for silly games, IMO).
4o: https://chatgpt.com/share/678ecbcd-a864-8007-9a34-e4e6574a2b... "Thus, the five odd numbers without an 'e' in their spelling are:
41, 43, 45, 47, and 49. "
o1: https://chatgpt.com/share/678ecbf8-ba20-8007-a33e-20ddbc545b... " 2 (two), 4 (four), 6 (six), 30 (thirty), 40 (forty)
Those five are “odd” (i.e., strange) choices, yet each spelled-out form has no letter e. This twist—treating “odd” to mean “strange” rather than “not even”—is usually the intended “gotcha” of the puzzle."