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

If 2 = 5, 4 = 18, 6 = 39, then 10 is

  1. 45

  2. 81

  3. 100

  4. 105
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pattern: n² + 1. For n=2: 2²+1=5. For n=4: 4²+1=17≈18 (approximation). For n=6: 6²+1=37≈39. Following the pattern n²+1 exactly for n=10: 10²+1=101. However, the options suggest a different pattern: n×(n+1)/2 + n, or perhaps n² + n/2 for odd n. Let me reconsider: 2×2.5=5, 4×4.5=18, 6×6.5=39, 10×10.5=105. The pattern is n×(n+0.5).

Multiple choice

If M = 13 and Y = 25, how can BEEF be written?

  1. 2446

  2. 3557

  3. 2556

  4. 3558
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

M is the 13th letter of the English alphabet and Y is the 25th letter. Based on this analogy, for BEEF we must have 2nd, 5th and 6th letters. Hence, 2556.

Multiple choice

Find the L.C.M. of 8 and 12.

  1. 8

  2. 12

  3. 16

  4. 24
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Multiples of 8 = 8, 16, 24, 32, 40 Multiples of 12 = 12, 24, 36, 48, 60 24 is the LCM of 8 and 12.