size it up.

A little perspective

Weight

Add or remove either object to balance the pans. You have five weighings; only your best score counts. Exact balance earns 100 points and finishes the challenge. Empty pans cannot score. A new pair arrives at 00:00 UTC.

Read the full rules and scoring guide
Practice · not ranked
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WEIGHT LAB 2026-09-29

Find the balance.

Past challenge. Scores do not count toward leaderboards or today’s progress.

5 of 5 weighings leftNo weighings yet
Left pan · Tennis ball× 1
Right pan · Bowling pin× 1
Adjusting · scale held
Adjust either side, then weigh.The scale is held while editing. Weigh to get feedback.

Adjust both quantities

Left panTennis ball
Right panBowling pin

Click or drag to the matching pan · or type a quantity

5 of 5 weighings left
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View answers

Answers from this past challenge. Today’s challenge remains a surprise.

One exact solution: 25 × Tennis ball = 1 × Bowling pin

Tennis ball
Left panTennis ball60 g
Bowling pin
Right panBowling pin1,500 g

Weights are set for this game, not real product specifications.

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