ATQ, 1728 + (17 × 2) = 1762 1762 + (16 × 3) = 1804 1804 + (15 × 4) = 1854 1854 + (14 × 5) = 1912 1912 + (13 × 6) = 1982 Therefore, '1982' should come in place of '1978'.
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