168, 288, 360, 528, 841, 960
Sol. Series is 13² - 1, 17² - 1, 19² - 1, 23²- 1, 31² - 1
∴ wrong term = 841
Sol. Series is 13² - 1, 17² - 1, 19² - 1, 23²- 1, 31² - 1 ∴ wrong term = 841
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