How many times will the digit 7 be written when listing the integers from 1 to 1000? 1. 110 2. 111 3. 217 4. 300 5. 304 All the numbers (0,1,2,...9) will be appearing equal number of times. The numbers are : 000 001 002 ..... ..... 999 So, there are a total of 3*1000 digits. Now the number of times...