The digit at unit place is 2 greater than the digit at tens place then...
Digit at unit place is 2 greater than the digit at tens place
To find the possible number, we need to determine the relationship between the digits at the unit and tens places.
Analysis of the given options:
a) 67
The digit at the unit place is 7, and the digit at the tens place is 6. The difference between these two digits is 7 - 6 = 1, which is not 2 greater. Therefore, option a) is not a possible number.
b) 78
The digit at the unit place is 8, and the digit at the tens place is 7. The difference between these two digits is 8 - 7 = 1, which is not 2 greater. Therefore, option b) is not a possible number.
c) 68
The digit at the unit place is 8, and the digit at the tens place is 6. The difference between these two digits is 8 - 6 = 2, which is exactly 2 greater. Therefore, option c) is a possible number.
d) All the above
Since options a) and b) are not possible numbers, we can eliminate option d) as well.
e) None of these
Since option c) is a possible number, we can eliminate option e) as well.
Conclusion:
The only possible number among the given options is 68, which is option c).