This looks like a limitation and it is the design. Memory research has been consistent on this point for over a century: material spread across many short sessions is retained far better than the same material crammed into one long one, an effect so well established it has its own name, the spacing effect.

A single question you actually stop and think about does more than twenty you skim through. It also means there is no way to fall behind, which is what usually kills a learning habit.

Answering and immediately seeing whether you were right is called retrieval practice, and it consistently outperforms re-reading in study after study. Being tested and failing beats revising and feeling confident, even though the second feels far more productive at the time.

So the wrong answers are not wasted days. A fact you guessed wrong and then saw corrected tends to stick better than one you never had to commit to at all.

The rotation draws on fifty topic sets and keeps growing — world and Malaysian geography, Malaysian history and culture, animals, space, the human body, inventions, sport, food, the environment, art and music, and more besides. Some days you will get a subject you know cold; some days you will not.

Questions are in English. Everything else on the site is bilingual, but the quiz stays in one language deliberately so a daily question remains a quick fifteen seconds rather than a reading exercise.

A streak is effective for a slightly uncomfortable reason: people work harder to avoid losing something than to gain it. Once you are eleven days in, the eleven days themselves become the motivation, and milestones at 3, 7, 14, 30, 60 and 100 days mark the run as it builds.

One practical note. Playing as a guest keeps your streak in your browser, so it is lost if you clear your cache or switch device. Registering saves it to your account instead, which is the difference between a number you might lose and one you will not. Congak at cerdikcerdik.com/math keeps its own separate streak if you want two habits running.