True number-series IQ
Number sequences are the IQ-ceiling of serious psychometric tests — Mega Test and Cattell CFIT series. Six levels climb from arithmetic through Fibonacci to Tribonacci, then a boss-mix L6 of classical Mega-Test rules including the Padovan trap.
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Levels
Every level is unlocked. L5 uses the Tribonacci recurrence (template). L6 is a Mega-Test mix — the last puzzle will genuinely stump most players.