What is the pattern in the sequence: A,C,F,J?

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SUMMARY

The sequence A, C, F, J corresponds to the triangular numbers 1, 3, 6, and 10. The differences between these numbers increase by one: 2, 3, 4, leading to the next difference of 5. Therefore, the next number in the sequence is 15, which corresponds to the letter O in the alphabet. This conclusion was confirmed by user Sridhar.

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Find the next letter:
A,C,F,J
 
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A C F J _____________?

The answer is O. This is because A = 1, C = 3, F = 6, J = 10.

The series: 1 3 6 10. The difference between each no is increasing by one. i.e, 3-1 = 2; 6-3 = 3; 10-6 = 4; the next difference is 5 and thus the no is 15. The alphabet corresponding to 15 is O.


Sridhar
 

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