Quizza:1b:2c: …3! 15!20! note : -gatau-_-_-_-:v
No. 1
a : 1
b : 2
c : 3 ✔
.
No. 2
3!
= 3 × 2 × 1
= 6 × 1
= 6 ✔
.
No. 3
15!
= 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1
= 1.307.674.368.000 ✔
.
No. 4
20!
= 20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1
= 2.432.902.008.176.640.000 ✔