Complete the series:
7, 23, 95, 479, 2879, ?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 20159
The terms grow faster and faster, which points to multiplication by a rising number. Each term is the one before multiplied by 3, 4, 5, … and then increased by 2, 3, 4, ….
\(7\times3+2=23\)
\(23\times4+3=95\)
\(95\times5+4=479\)
\(479\times6+5=2879\)
Next: \(2879\times7+6=20153+6=20159\)