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The octal equivalent of 15 10 is

(a) 15 8

(b) 17 8

(c) 19 8

(d) 21 8



15 10 is a decimal number. 

To find the octal equivalent of a decimal number:

  • Repeatedly divide the decimal number by 8 until the quotient becomes less than 8 and record all the remainders. 
  • The remainders should be written bottom to upwards to get the octal equivalent of the decimal number.

Converting Decimal 1510 Into Octal (Base 8) - Teachoo.jpg

Therefore, 15 10 = 17 8

So, the correct answer is (b).

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Converting Decimal 1510 Into Octal (Base 8)

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.