Greatest 8 digit number is
99999999
10000000
9999999
88888888
The explanation for correct option:
The greatest number of n- digit is of the format 9999....upto n-times, so the greatest 8 digit number is 99999999.
Hence, option A is correct.
Use the digits 2,8,7,4 to make the greatest and smallest four digit numbers.
Form the greatest and smallest 4-digit numbers using any one of the given digits twice:
1,8,0
The greatest 8 digit number using the digits 1,0,3,5
Find the greatest 8 digit number which has 4 different digits.