find the series 2,5,13,36,104,??
Answer (1)
Student Expert
2nd Feb, 2022
Hi
Given series is 2,5,13,36,104,?
On close observation, we notice that
Number at a given position = ( number at just previous position in series) x 3 - ( number's position in the series -1 )
So,
Number at 2nd position
= 2 x 3 - ( 2-1)
= 6 - 1
= 5
Number at 3rd position
= 5x 3 - ( 3-1)
= 15 - 2
= 13
Similarly,
Number at ? Mark
= Number at 6th position
= 104 x 3 - ( 6-1)
= 312 - 5
= 307
Hence, ? = 307
Comments (0)
