Reciprocal

About Reciprocal

Reciprocal, whose page is titled Inverse, tests one specific skill: turning a decimal back into the number it is one over. Each round shows the A⁻¹ value, such as 0.8370659, and you enter your guess for A on a number pad. Your answer is checked against the real value and scored for accuracy, up to 1000 points a round.

The daily mode uses the UTC date as its seed, so every player sees the same five numbers that day. Each round runs on a 20-second timer, shown as a bar across the top. At the end you get a total out of 5000, a letter rank and a row of coloured squares you can share. The game keeps a streak, your best score and a history of past dailies in your browser.

A practice mode deals unlimited rounds for warming up. The look is spare, in a monospaced font on a dark background, and it works with the on-screen pad or a keyboard. It suits players who like number sense and quick estimation more than puzzles with one exact answer.

How to play Reciprocal

1. Open the game and choose Daily Mode.
2. Read the A⁻¹ value: the reciprocal of a hidden number between 1 and 100.
3. Work out roughly what number it is one over, and type your guess before the 20-second timer ends.
4. Press Submit to see the answer and your accuracy for the round.
5. Play all five rounds, then share your score out of 5000 and your rank.

Tips

• Learn a few anchors: 0.5 is 2, 0.25 is 4, 0.1 is 10, 0.05 is 20, 0.02 is 50, 0.01 is 100.
• For values above 0.5, the answer is between 1 and 2: 1 divided by 0.8 is 1.25.
• Decimals are allowed, so type a decimal guess when the answer is small.
• Use Practice mode to build speed before the daily.

Questions