Saturday, November 15, 2014

Figure out sequence

Mathematical aptitude tests frequently have sets of numbers where you are supposed to figure out a pattern or guess the next number. For example,

(2, 4, 6, 8, 10)  is a list of even numbers corresponding to 2×n  for n = 1, 2, 3, ...
(1, 1, 2, 3, 5)  is the well-known Fibonacci series where two adjacent numbers are added to produce the next number.
(2, 3, 5, 7, 11)  is a list of prime numbers.
(1, 2, 4, 8, 16)  is an exponential series corresponding to 2n  for n = 0, 1, 2, ...

Can you figure out the special significance of the following sequence?
                                
                                      (2, 6, 10, 15, 19)

Watch this space for answer in a week.

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