Mathematics · Quantitative Aptitude

Number Operations and Properties

974 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 multiplication and division vedic methods of multiplication vedic mathematics history of mathematics maths

Dividing using 'Dhwajanka' Sutra.
(i) $3987\div 28$
(ii) $5786 \div 78$
(iii) $7396 \div 82$

  1. $i) Q=140, R=14, ii)Q=74, R=14, iii)Q=90, R=16$
  2. $i) Q=142, R=11, ii)Q=74, R=14, iii)Q=90, R=16$
  3. $i) Q=142, R=11, ii)Q=74, R=0, iii)Q=90, R=16$
  4. $i) Q=142, R=11, ii)Q=74, R=14, iii)Q=90, R=12$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Dhwajanka method calculations: 3987/28 gives Q=142, R=11; 5786/78 gives Q=74, R=14; 7396/82 gives Q=90, R=16.

Multiple choice maths power and exponent power of powers laws of exponents and powers law of indices

Comparing the numbers $10^{-49}$ and 2. $10^{-50}$ we may say

  1. the first exceeds the second by 8. $10^{-1}$
  2. the first exceeds the second by 2. $10^{-1}$
  3. the first exceeds the second by 8. $10^{-50}$
  4. the second is five times the first

  5. the first exceeds the second by 5

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

${ 10 }^{ -49 }-2\cdot { 10 }^{ -50 }={ 10 }^{ -50 }(10-2)=8\cdot { 10 }^{ -50 }\ \therefore { 10 }^{ -49 }\hspace{1mm} exceeds\hspace{1mm} 2\cdot { 10 }^{ -50 }\hspace{1mm} by\hspace{1mm} 8\cdot { 10 }^{ -50 }$

Multiple choice physics units and measurement: error analysis significant figures significant figures and rounding of digits units and measurements

The number of significant figure In the numbers $4.8000 \times 10^4$ and $48000.50 $ are respectively then

  1. $5$ and $6.$
  2. $5$ and $ 7$.
  3. $2$ and $7.$
  4. $2$ and $6$.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
If any number has more than one digit after decimal place are significant. Power of 10 does not affect number of significant figures.
$4.8000 \times 10^{4} = 5$ significant figure $(4,8,0,0,0)$
$48000.50 = 7$ significant figure $(4,8,0,0,0,5, 0)$
Multiple choice physics units and measurement: error analysis significant figures significant figures and rounding of digits units and measurements

Write down the significant figures in the following
1. $5238$ N
2. $4200 $kg

  1. $4 , 4$
  2. $4 , 2$
  3. $4, 3$
  4. $5, 3$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
All non-zero digits are significant and last zeros are not considered as significant.
(a) : The given number $5238$ has four significant figures.
(b) : The given number $4200$ has two significant figures.