Correct Answer - Option 4 : 225
Concept:
Steps to convert decimal number to octal:
1) Write the given decimal number.
2) If the given decimal number is less than 8 the octal number is the same.
3) If the decimal number is greater than 7 then divide the number by 8.
4) Note the remainder, we get after division.
5) Repeat steps 3 and 4 with the quotient till it is less than 8.
6) Now, write the remainders in reverse order (bottom to top).
7) The resultant is the equivalent octal number to the given decimal number.
Calculation:
Given decimal number = 149
The long division method is as shown:
DIAGRAM
∴ The correct octal equivalent of 149 is 225
