Math Is Fun Forum

Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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#1 2018-07-20 07:05:43

14, 20, 55, 198, 521, ?

5, 1, 3, 9, 31, ?

15, 16, 20, ? , 303, 3428

Last edited by Siva882 (2018-07-20 07:07:05)

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