BRACKET

Five questions with a number for an answer. Don’t name the number — bracket it. Drag the two handles so the answer sits between them, then lock it in.

• If the answer is inside your bracket, the narrower it is, the more it scores — 100 minus the share of the track it covers. A bracket covering a tenth of the track scores 90.
• If the answer is outside, the question scores nothing. The whole track is always safe, and worth zero.
• Each track is chosen for its question. Some run in powers of ten — the readout says logarithmic — so a tenth of the track can be a whole order of magnitude.
• Your score for the day is the average of the five, out of 100.

One set a day. Your scores are kept — Statistics is in the menu — and Bracket sits outside the daily line-up, so it never moves your day’s total.