Secret! JAMB reveals what past questions they don't repeat

JAMB has explained what years of past questions it does not repeat. How true is this? While JAMB's Registrar, Prof. Is’haq Oloyede was briefing the News Agency of Nigeria (NAN) concerning children of CBT center owner arrested for exam malpractice, he made a statement which says that JAMB does not repeat past questions as new as 4 or 5 years ago. His words:

"One thing these fraudsters failed to understand is that we do not repeat questions used as far back as four or five years ago, let alone using them for any of the four sessions we deploy per day. "These questions have been standardized and so they can never be the same.

Basically speaking, the JAMB boss is saying that they do not repeat questions from recent past questions (1, 2, 3, 4, and 5 years ago past questions). But how true is this when you check the past questions because it seems some questions are either repeated, maybe not verbatim but with the grammar changed. This to me is a repetition!