Tag: maths

Questions Related to maths

Which of the following numbers are not divisible by 2, by 3 and by 6?

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

  1. 321729

  2. 197232

  3. 972132

  4. 312792

Show answer
Correct Option: A
Explanation:

$321729$not divisible by $2,3,6$

$197232$ divisible by $2,3,6$
$972132$ divisible by $2,3,6$
$312792$ divisible by $2,3,6$

Evaluate :
$60\times 8$

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

  1. 480

  2. 58

  3. 25

  4. 420

Show answer
Correct Option: A
Explanation:

We have,


$60\times 8$$=480$


Somya caught twice as many fishes as her dad. If her dad caught F fishes, how many fishes did Somya catch ?

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

  1. $F + 2$

  2. $F - 2$

  3. $F \times 2$

  4. $F \div 2$

Show answer
Correct Option: C
Explanation:

Given that:

Somya caught twice as many fishes as her dad. 
$\because$ Somya's dad caught $=F\ $ Fishes
$\therefore$ Somya caught $=2\times F\ $ Fishes

This is the required answer.

$587\times 999=$?

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

  1. $586413$

  2. $587523$

  3. $614823$

  4. $615173$

Show answer
Correct Option: A
Explanation:

$587\times 999=587\times (1000-1)$
$=587\times 1000-587\times 1$
$=587000-587$
$=586413$

$(935421\times 625)=$?

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

  1. $575648125$

  2. $584638125$

  3. $584649125$

  4. $585628125$

Show answer
Correct Option: B
Explanation:

$93521\times 625=935421\times {5}^{4}=935421\times {(\cfrac{10}{2})}^{4}$
$\cfrac{935421\times{10}^{4}}{{2}^{4}}=\cfrac{9354210000}{16}$
$=584638125$

$2056\times 987=$?

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

  1. $1936372$

  2. $2029272$

  3. $1896172$

  4. $1926172$

  5. None of these

Show answer
Correct Option: B
Explanation:

$2056\times 987=2056\times (1000-13)$
$=2056\times 1000-2056\times 13$
$=2056000-26728$
$=2029272$.

$72519\times 9999=$?

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

  1. $725117481$

  2. $674217481$

  3. $685126481$

  4. $696217481$

  5. None of these

Show answer
Correct Option: A
Explanation:

$72519\times 9999=72519\times(10000-1)$
$=72519\times 10000-72519\times1$
$=725190000-72519$
$=725117481$

$(123456789\times 72)=$?

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

  1. $88888888$

  2. $888888888$

  3. $898989898$

  4. $9999999998$

Show answer
Correct Option: B
Explanation:

$12345679\times 72=123456789\times (70+2)$
$=12345679\times 70+123445679\times 2$
$=864197530+24691358$
$=888888888$

On multiplying a number by $7$, the product is a number each of whose digits is $3$. The smallest such number is:

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

  1. $47619$

  2. $47719$

  3. $48619$

  4. $47649$

Show answer
Correct Option: A
Explanation:

By hit and trial , we find that
$47619\times=333333$.

$(112\times {5}^{4})=$?

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

  1. $67000$

  2. $70000$

  3. $76500$

  4. $77200$

Show answer
Correct Option: B
Explanation:

$(112\times {5}^{4})=112\times { \left( \cfrac { 10 }{ 2 }  \right)  }^{ 4 }=\cfrac { 112\times { 10 }^{ 4 } }{ { 2 }^{ 4 } } =\cfrac { 1120000 }{ 16 } =70000$