
MathZen
Mental math & brain training challenges for all levels
What it does
MathZen is a modern brain training and mental math game designed to sharpen focus, boost calculation speed, and build daily learning habits. Train with Quick Math, Timed Challenges, Memory Math, Logic Puzzles, Speed Tap, and more — with XP, streaks, achievements, and smooth animations. Free, offline-ready, and dark mode optimized. Built for all skill levels.
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- IMI made a website to learn and practice mental math2024 · mentalmathpro.com · ▲29

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Parallel agents, diff reviewer, and multi-model comparisons
Dev tools · May 2026 · kilo.ai


- NW
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
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Dev tools · May 2026 · github.com