Verified Answer :

RedRicin

4 = 2² (2×2)
9 = 3² (3×3)
16 = 4² (4×4)

50, however, can't be written with a power like ² or ³.
It falls between 7² (49) and 8² (64).
It falls between 3³ (27) and 4³ (64)...etc.

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