1, 2, 6, 24,? ,720

As per given series , we can see thatFirst term = 1Second term = First term × 2 ⇒ Second term = 1 × 2 = 2Similarly we can find the all others termsThird term = Second term × 3 ⇒ Third term = 2 × 3 = 6Fourth term = Third term × 4 ⇒ Fourth term = 6 × 4 = 24Fifth term = Fourth term × 5 ⇒ Fifth term = 24 × 5 = ? ∴ ? = 120 Sixth term = Fifth term × 6 ⇒ Sixth term = 120 × 6 = 720