Question

Q.


13! = ...?
12! = ...?

__________

BABAII-!!!​

Answer 1

13! = (13 × 12) 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4×3×2× 1

=(156 × 11) 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= (1.716 × 10) 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= (1.7160 × 9) 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= (154.440 × 8) 7 × 6 × 5 × 4 × 3 × 2 × 1

= (1.235.520 × 7) 6 × 5 × 4 × 3 × 2 × 1

= (8.648.640 × 6) 5 × 4 × 3 × 2 × 1

= (51.891.840 × 5) 4 × 3 × 2 × 1

= (259.459.200 × 4) 3 × 2 × 1

= (1.037.836.800 × 3) 2 × 1

= (3.113.510.400 × 2) 1

= 6.227.020.800 × 1

= 6.227.020.800

12! = (12 × 11) 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= (132 × 10) 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= (1.320 × 9) 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= (11.880 × 8) 7 × 6 × 5 × 4 × 3 × 2 × 1

= (95.040 × 7) 6 × 5 × 4 × 3 × 2 × 1

= (665.280 × 6) 5 × 4 × 3 × 2 × 1

= (3.991.680 × 5) 4 × 3 × 2 × 1

= (19.958.400 × 4) 3 × 2 × 1

= (79.833.600 × 3) 2 × 1

= (239.500.800 × 2) 1

= 479.001.600