100
The answer is 9 times 9 x 100 = 900
11.
100 of them.
9x9+9+9+9/9
100,0000000 (9 zeroes)
9
9
20 of them
100 has 9 factors: 1, 2, 4, 5, 10, 20, 25, 50 and 100.
There are 5 20s in a 100.
There are 100 centimetres in one metre. Therefore, 9 metres is equal to 9 x 100 = 900 centimetres.