3 4 12 ? 196 ,find the missing number?
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3×1 + 1×1 = 4
4×2 + 2×2 = 12
12×3 + 3×3 = 45
45×4 + 4×4 = 196
Answer is 45.
3×1 + 1×1 = 4
4×2 + 2×2 = 12
12×3 + 3×3 = 45
45×4 + 4×4 = 196
Answer is 45.
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