Select all that are equal to 3.

A logarithm asks what exponent on the base gives the number. Since 2³ = 8, log₂8 = 3; since 3³ = 27, log₃27 = 3; and since 10³ = 1,000, log₁₀1,000 = 3. But 4² = 16, so log₄16 = 2, not 3.

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