Rankle #122 answer: mass (lightest to heaviest)

The answer

Rank by mass (lightest to heaviest)

1. 1Earth's Moon7.342 × 10^22 kg
2. 2Ganymede14.819 × 10^22 kg
3. 3Mercury3.301 × 10^23 kg
4. 4Mars6.417 × 10^23 kg

Why this order

Ranked lightest to heaviest, Earth's Moon (7.342 × 10^22 kg) goes at the top and Mars (6.417 × 10^23 kg) at the bottom.

The closest call is Mercury (3.301 × 10^23 kg) against Mars (6.417 × 10^23 kg), about 94% apart. That is the swap most likely to cost a point.

The biggest gap is between Ganymede and Mercury, about 2.2 times apart, so that boundary should be the easiest part of the order to get right.

These are the figures the game reveals after you submit. They are rounded; only the order is scored.

Difficulty: easier, judged by how close the tightest pair is.

Similar puzzles: Rankle #48, Rankle #59, Rankle #68, Rankle #92.

How it was scored

right slot, one place out, two or more out. The score is how many items sit in the right slot, and only 4/4 is a win. Full rules on the how to play page.