Multiple choice softskills creativity

Which is heavier? 1kg cotton or 1kg iron?

  1. cotton

  2. iron

  3. none

  4. both are same
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Both 1kg cotton and 1kg iron have the same mass (1 kilogram). The confusion often comes from the difference in density - cotton is much less dense than iron, so 1kg of cotton occupies much more volume than 1kg of iron. However, 'heavier' refers to weight/mass, which is equal in this case.

AI explanation

A kilogram is a fixed unit of mass, so 1kg of cotton and 1kg of iron weigh exactly the same amount — the difference between them is in density and volume, not mass. This is a classic riddle that trips people up because they intuitively think of iron as "heavier," forgetting that the quantities are already equalized by the unit given.

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