In octal system 18 is written as ______?
- (22)₈
- (221)₈
- (220)₈
- None of these
Explanation
To convert 18 (decimal) to octal:
18 ÷ 8 = 2 remainder 2
2 ÷ 8 = 0 remainder 2
Reading the remainders from bottom to top, 18₁₀ = 22₈.
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