Numina: Mental Math Games

Nine games, nine skills. Playing in seconds, no account.

Each game trains something different. Cascade drops equations like rain and asks for speed. Libra shows two expressions and asks which is bigger. Equato hands you tiles and a target, and pays more for using fewer. Echo flashes a chain of operations one step at a time, then takes it away — the one that really works your working memory. Prisma reads a sequence and asks what comes next, Nexus links cells across a grid so the total lands exactly, and Lacuna hides a number, or the sign itself, and waits. Tessera has no clock at all: merge neighbouring cells until one is left on the target. Indicia gives you identical tokens, a balance scale and a counted number of weighings — and decides nothing in advance, so guessing never works.

One shared challenge every day, the same puzzle for every player, rotating through all nine. A separate times-tables trainer tracks each table on its own, and brings back the ones that resist. Difficulty adapts as you improve, so it never goes stale, and there is no sign-up and no tutorial to sit through: open the app and you are playing in seconds, with or without a connection.