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A Consecutive Sequence ? (Posted on 2007-03-09) Difficulty: 3 of 5
Determine the missing initial term in the following sequence:

?, 3, 4, 6, 8, 12, 19.2, 38.4, ...

  Submitted by K Sengupta    
Rating: 4.3333 (3 votes)
Solution: (Hide)
Obtain the product of two successive terms in the sequence and divide respectively by 1, 2, 3, 4, 5 and 6 to get the next term:

Thus, (4/3*3)/1 = 4; (3*4)/2 = 6; (4*6)/3 = 8; (6*8)/4 = 12; (8*12)/5 = 19.2 and (12*19.2)/6 = 38.4

Consequently, the required missing term is 4/3.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Some Thoughtsre: ?K Sengupta2023-09-08 22:41:10
No SubjectK Sengupta2022-03-23 13:01:50
No SubjectAmanda Holmes2022-03-23 12:35:07
?puneeth2007-03-10 20:01:27
SolutionAnswer (no spoiler)Old Original Oskar!2007-03-09 09:15:45
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