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 2026-10-02

Find the balance.

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

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

Adjust both quantities

Left panBank card
Right panTable tennis ball

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: 3 × Bank card = 5 × Table tennis ball

Bank card
Left panBank card5 g
Table tennis ball
Right panTable tennis ball3 g

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

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