••••• •••••••••• •••••••••• •••••••••• •••••
Numbers: 0 1 2 3 4 5 6 7 8 9
10 20 30 40 50 60 70 80 90
100 200 300 400 500 600 700 800 900
40 (also written as forty or four ten) is the number that is after thirty-nine and before forty-one.
The prime factors of forty are 2 and 5. (2 * 2 * 2 * 5 = 40)
Forty is also the only number in the English language which is spelt in alphabetical order. view more...