which number replaces the question mark (?) in the following number series? 1, 3, 26, 649 ?
Iska solution.
Answers
Given : 1 3 26 649 ?
To find : Next number in Sequence
31790
31800
31801
31812
Solution:
1 3 26 649 ?
1
1 x 2² - 1 = 3
3 x 3² - 1 = 26
26 x 5² = 1 = 649
649 x 7² - 1 = 31800
Sequence here is previous number multiplied by square of prime number and 1 is subtracted
Next number in series is 31800
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ANSWER ⤵️
1 3 26 649 ?
1
1 x 2² - 1 = 3
3 x 3² - 1 = 26
26 x 5² = 1 = 649
649 x 7² - 1 = 31800
Sequence here is previous number multiplied by square of prime number and 1 is subtracted