192 digits
101
1 googol = 10100 = '1' followed by 100 zeroes. The number has (1 googol + 1) digits.
25 digits
425
There are 2700 digits.
25 digits
300
-99
10 digits, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0
139
17
-99
7 digits
19 do.
Just 1 The two zeros are placeholders- placeholders are not significant
9