Number Lander Game
The ground of the Moon is a number line with only a few marks on it, and each drop names a number: a fraction, a percentage, a decimal, a square root, a negative number or a number up to 1,000. Steer the probe and fire its engine to touch down gently on the spot where that number belongs. Placing numbers on a line is the skill that estimation rests on, and a landing turns your guess into something you can see.
Each drop names a number, and the ground is a number line with only a few marks. Steer the probe down and land it where the number belongs.
How to play
- Each drop names a number at the top of the sky, such as 3/8. The ground is a number line from 0 to 1, with marks only at ¼, ½ and ¾.
- Hold LEFT or RIGHT to steer the probe, and hold THRUST to slow its fall. A dashed line under the probe shows where it would land.
- Touch down gently on the spot where the number belongs. Come down too fast and the probe breaks.
- After each landing the true spot shows on the line, with what your landing scored, so you can see how far off you were.
- A level is five drops of one kind of number, and the fuel in the tank has to last all five. Each new level brings a new line and a full tank.
On a keyboard, hold the left and right arrows or A and D to steer, and Space, the up arrow or W to fire the engine. Escape pauses. Practice mode loses no probes and saves no score.
Scoring
A landing within 2 percent of the line's length from the spot scores 100 points. Further off, the points fall away, down to 10 for a landing just inside 10 percent.
- A landing more than 10 percent away, or too fast, scores nothing and loses one of your three probes. The game ends with the third.
- Each percent of fuel left at the end of a level adds a point.
The levels go in this order: fractions from 0 to 1, percentages from 0 to 100, decimals from 0 to 1, square roots from 0 to 10, negative numbers from −10 to 10, and big numbers from 0 to 1,000. Then they come round again, each time with less fuel.
Your five best scores are saved in this browser, with the level you reached. Practice games are not saved.
A memorizer who knows that 1/8 is 0.125 and 1/7 is about 0.143 lands right on the mark. Our guide to mental math has more ways to get a feel for numbers, and Root Sniper drills square roots on their own. Or try our other free memory games.
