Tag: maths

Questions Related to maths

If $\displaystyle (1-1.25)N=1$, Then N=

  1. -400

  2. -140

  3. -4

  4. 4

  5. 400


Correct Option: C
Explanation:

As given,

(-0.25) $\times$ N = 1
$\rightarrow$ N = $\cfrac{1}{-0.25} $ = $-4$ (option C

$3889 + 12.952 - ? = 3854.002$

  1. $47.095$

  2. $47.752$

  3. $47.932$

  4. $47.95$


Correct Option: D
Explanation:

Let $3889 + 12.952 - x = 3854.002$.
Then $x=\left( 3889+12.952 \right) -3854.002$
             $= 3901.952 - 3854.002$
             $= 47.95$.

What is the value of $2.\overline {6} - 1.\overline (9)$

  1. $0.\overline {6}$

  2. $0.\overline {9}$

  3. $0.\overline {7}$

  4. $0.7$


Correct Option: A
Explanation:

The value of $2.\overline {6} - 1.\overline {9}$ is
$= \left (2 + \dfrac {6}{9}\right ) - \left (1 + \dfrac {9}{9}\right )$
$= \dfrac {6}{9} = 0.\overline {6}$

$3.\overline { 87 } -2.\overline { 59 } =$?

  1. $1.20$

  2. $1.\overline { 2 } $

  3. $1.\overline { 27 } $

  4. $1.\overline { 28 } $


Correct Option: D
Explanation:

$3.\overline { 87 } -2.\overline { 59 } =\left( 3+0.\overline { 87 }  \right) -\left( 2+0.\overline { 59 }  \right) $

$=\left( 3+\dfrac { 87 }{ 99 }  \right) -\left( 2+\dfrac { 59 }{ 99 }  \right) $

$=1+\left( \dfrac { 87 }{ 99 } -\dfrac { 59 }{ 99 }  \right) $

$=1+\dfrac { 28 }{ 99 } $

$=1.\overline { 28 } $.

Simplify:
$417.25 - 41.72 - 4.53 =$ ?

  1. $380.06$

  2. $371$

  3. $348$

  4. $315$

  5. None of these


Correct Option: B
Explanation:

$417.25 - 41.72 - 4.53$
$=371$.

Hence the correct answer is option B

The value of 30.5 - 30.4 + 30.3 - 30.2 + 30.1 - 30 + 29.9 - 29.8 + 29.7 - 29.6 + 29.5 - 29.4 + 29.3 - 29.2 + 29.1 - 29.0 = _________.

  1. $0.8$

  2. $0.7$

  3. $0.6$

  4. $1.8$


Correct Option: A
Explanation:

We have, $(30.5 - 30.4) + (30.3 - 30.2) + (30.1 - 30) + (29.9 - 29.8) + (29.7 - 29.6) + (29.5 - 29.4) + (29.3 - 29.2) + (29.1 - 29.0)$
$= 0.1+ 0.1 + 0.1 + 0.1 + 0.1+ 0.1 + 0.1 + 0.1$
$= 0.8$.

The value of $0.0001289-0.0000000274\times 1293+0.0000419032$ is _________?

  1. $0.0135375$

  2. $0.000153357$

  3. $135375000$

  4. $0.166632277$


Correct Option: D
Explanation:
We need to find value of$0.0001289-0.0000000274\times 1293+0.0000419032$ 
We have, $0.0001288726\times 1293.0000419032$
$=0.166632277$

What is the sum of $11.006+34+0.72$ rounded to the nearest tenths?

  1. $45.1$

  2. $45.7$

  3. $45.73$

  4. $46$


Correct Option: B
Explanation:

The sum of $11.006+34+0.72$ is $45.726$.
Now, the number $45.726$ is rounded off as $45.73$.

Again it is rounded to nearest tenths as $45.7$.





A A B B C C D D E E
M S M S M S M S M S
$2006$ $2.8$ $1.3$ $3.3$ $2.2$ $2.6$ $1.7$ $3.0$ $2.2$ $1.9$ $1.4$
$2007$ $3.2$ $2.0$ $2.4$ $1.6$ $2.2$ $1.5$ $2.5$ $1.9$ $2.0$ $1.7$
$2008$ $1.9$ $0.9$ $2.9$ $1.6$ $2.1$ $1.0$ $2.3$ $1.5$ $1.6$ $1.1$
$2009$ $1.0$ $0.4$ $2.4$ $1.3$ $2.8$ $1.4$ $2.1$ $1.2$ $3.2$ $2.5$
$2010$ $2.5$ $1.5$ $2.3$ $1.2$ $2.6$ $2.1$ $1.8$ $1.1$ $3.1$ $2.6$


What is the total number of units manufactured by company C over all  the years together?

  1. $14.20$

  2. $10.30$

  3. $12.30$

  4. $13.20$


Correct Option: C
Explanation:

Total number of units manufactured by company C over all the years together

=$2.6+2.2+2.1+2.8+2.6 = 12.3 $

Find the value of $617+6.017+0.617+6.0017$.

  1. $6.2963$

  2. $62.965$

  3. $629.6357$

  4. $62.8975$


Correct Option: C
Explanation:

given that, $617.0000+6.0170+0.6170+6.0017=629.6357$

hence option $C$ is correct