Multiple choice general knowledge math & puzzles

Which one is heavy

  1. 1 Kg Iron

  2. 1 Kg Cotton

  3. 1 Kg Gold

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

1 kg of any substance (Iron, Cotton, or Gold) has the same mass of 1 kg. The difference is in volume and density - 1 kg of cotton would occupy much more space than 1 kg of iron or gold. Since all three options have equal mass (1 kg), none of them is 'heavier' than the others, making 'None' the correct answer.

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