Question

Find the Next Letter in the Series: c, c, d, f, i
What is the missing letter in this series: c, c, d, f, i, ? a. j b. l c. m d. n

Answer 1

next letter is  m

let    c + 0 = c.
c + 1 = d.
d + 2 = f.
f + 3 = i.
i + 4 = m.