Question
13Â Â Â Â Â 26Â Â Â Â Â Â 104 Â Â Â Â Â Â 624Â
     ?       49920 What should come in place of question mark ‘?’ in the following number series?Solution
13 × 2 = 26 26 × 4 = 104 104 × 6 = 624 624 × 8 = 4992 4992 × 10 = 49920
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