A scale shows 20 kg when a 5 kg weight is placed on it. What is the actual weight of the scale?
Category: Math · Difficulty: medium
Hint: The scale reads the total weight, not just the added weight.
Answer
15 kg
Explanation
The scale shows the combined weight of the scale itself plus the 5 kg weight, so the scale must weigh 15 kg.
This is a medium math riddle — a moderate challenge for most people. The answer is 15 kg.
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