Mathematics for IGCSE & O level - Number (Section 3 - No. 38)

Which set of numbers contains only natural numbers?

{-1, 0, 1, 2}

{0, 1, 2, 3}

{1, 2, 3, 4}

{-2, -1, 0, 1}

Giải thích

Natural numbers are positive integers starting from 1.

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