The Series 7 doesn't fail people on breadth - it fails them on arithmetic under pressure: options breakevens, spreads and straddles, max gain and max loss (the documented #1 failure cluster), then municipal yield math and the margin chain. 73% of the exam is ONE function, and this is the supplement that makes its math automatic: every formula worked step by step (long call: ADD the premium - $50 + $3 = $53), every step drawn on the payoff diagram, every one refute-verified and independently recomputed before it was allowed to teach. One honest 125-question mock at true FINRA weights plus a reshuffled retake - we tell you it's an 81-question pool with disclosed repeats, not two fake independent forms. And the honest part nobody else prints: FINRA publishes NO pass rate - anyone quoting one is guessing. The real shape since October 2025: 130 items delivered, 125 scored, 5 unidentified pretest. One more truth up front: the Series 7 alone registers nobody - SIE + 7 + your firm's sponsorship. We say so on the first screen. 81-question practice bank, every fact taught aloud with a memory hook, explained answers, review tests at the real passing bar. First 5 modules free — no card required.