1, 7, 8, ______, 23, 38, 61
Find the missing term.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 15
From the third term on, each term is the sum of the two terms before it (as in the Fibonacci series):
\(1+7=8\)
\(7+8=15\) ← the missing term
\(8+15=23\)
\(15+23=38\)
\(23+38=61\)