Mathematics · Quantitative Aptitude

Number Operations and Properties

896 Questions

Improve your quantitative aptitude with these number operations and properties questions. The topics range from basic subtraction and division to highest common factor and roman numerals. Regular practice of these fundamentals builds speed for exams.

Basic arithmetic operationsHCF and number propertiesRoman numeral calculationsNumber series evaluation

Number Operations and Properties Questions

Multiple choice

The octal addition of (25)8 and (15)8 is:

  1. (42)8

  2. (40)8

  3. (41)8

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In octal addition: 5 + 5 = 10 (decimal), which is 12 in octal (write 2, carry 1). Then 2 + 1 + 1 (carry) = 4. Result is 42.

Multiple choice

Multiplication of 478 by 528 is

  1. 31448

  2. 41478

  3. 31468

  4. 31848
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

47 octal is 39 decimal, and 52 octal is 42 decimal. 39 * 42 = 1638 decimal. 1638 decimal converted to octal is 3146.