Tag: maths

Questions Related to maths

Add $1.25\ cm$ and $13.45\ cm$

maths how much does it weigh? basic operations with same units operations involving units of length calculations define weight and units of weight

  1. $2.595$

  2. $1.470$

  3. $14.70$

  4. $25.95$

Show answer
Correct Option: C
Explanation:

$1.25\ \ cm+13.45\ \ cm=14.70\ \ cm$

So option $C$ is correct.

Subtract :
$23.67\ m$ from $1.4\ km$

maths how much does it weigh? basic operations with same units operations involving units of length calculations define weight and units of weight

  1. $116.33$

  2. $1376.33\ m$

  3. $13976.33\ m$

  4. $22.27\ m$

Show answer
Correct Option: B
Explanation:

First we have to convert $km$ into $m$

$1\ \ km=1000\ \ m$
$\Rightarrow 1.4\ \ km=1.4\times1000=1400\ \ m$
Now subtracting both
$1400 \ \ m-23.67\ \ m=1376.33\ \ m$
So option $C$ is correct.

Add $23.456\ m$ and $26.5\ cm$ .

maths how much does it weigh? basic operations with same units operations involving units of length calculations define weight and units of weight

  1. $499.56\ cm$

  2. $49.956\ cm$

  3. $237.16\ cm$

  4. $2372.6\ cm$

Show answer
Correct Option: D
Explanation:
First we have to convert $m$ into $cm$
$1\ \ m=100\ \ cm$
$\Rightarrow 23.456\ \ m=23.456\times100=2345.6\ \ cm$
Now adding both
$2345.6\ \ cm+26.5\ \ cm=2372.6\ \ cm$
None of the options are correct

A pole is painted yellow and black. The yellow part is $1.8\ m$ long and the black is three times longer than yellow part. Find the length of pole.

maths how much does it weigh? basic operations with same units operations involving units of length calculations define weight and units of weight

  1. $5.4\ m$

  2. $7.2\ m$

  3. $3.6\ m$

  4. $none\ of\ these$

Show answer
Correct Option: B
Explanation:

Length of yellow Part $=Y=1.8m$

Length of Black Part $=3Y=5.4m=B$
So, Length of Pole $=L=Y+B=1.8+5.4=7.2m$

Rita had $\displaystyle 38\frac { 1 }{ 4 } $ m long rope. She cut it into 5 equal parts. Then the length of each piece will be- 

maths how much does it weigh? basic operations with same units operations involving units of length calculations define weight and units of weight

  1. $\displaystyle 1\frac { 1 }{ 4 } $ m

  2. $\displaystyle 2\frac { 3 }{ 4 } $ m

  3. $\displaystyle 3\frac { 1 }{ 4 } $ m

  4. $\displaystyle 1\frac { 3 }{ 4 } $ m

Show answer
Correct Option: D
Explanation:

Length of the rope $\displaystyle= 8\dfrac { 3 }{ 4 } m\ Number\quad of\quad peices\quad cut\quad =5\ Length\quad of\quad each\quad peice\quad =8\dfrac { 3 }{ 4 } m\div 5=\dfrac { 35 }{ 4 } m\times \dfrac { 1 }{ 5 } \ =\left( \dfrac { 35 }{ 4 } \times \dfrac { 1 }{ 5 }  \right) m=\dfrac { 7 }{ 4 } m=1\dfrac { 3 }{ 4 } m\ \therefore The\quad length\quad of\quad each\quad piece\quad of\quad the\quad rope\quad =1\dfrac { 3 }{ 4 } m.$

If Harry runs $23\ m\ 5\ cm$ and Joy runs $14.37\ m$ from the same starting point, then how far is Joy from Harry.

maths how much does it weigh? basic operations with same units operations involving units of length calculations define weight and units of weight

  1. $8.68\ m$

  2. $9.13\ m$

  3. $86.8\ m$

  4. $91.3\ m$

Show answer
Correct Option: A
Explanation:

We low that $1 m=100 cm$

Hence distance run by Harry $=23 m + 5 cm\=23 m+ \dfrac{5}{100} m\=23.05 m$
Distance run by Joy $=14.37 m$
Distance between them $=23.05 m -14.37 m\=8.68 m$
                                                 

Of the numbers 0.16, $\displaystyle \sqrt{0.16}$, $\displaystyle (0.16)^{2}$ and $\displaystyle 0.1\overline{6}$ the least number is

maths decimal numbers comparing and ordering of decimals more or less comparing decimals

  1. $\displaystyle (0.16)^{2}$

  2. $\displaystyle \sqrt{0.16}$

  3. 0.16

  4. $\displaystyle 0.1\overline{6}$

Show answer
Correct Option: A
Explanation:

0.16 = 0.16
$\displaystyle \sqrt{0.16}=0.4 $  $\displaystyle \Rightarrow 0.0256=\left ( 0.16 \right )^{2}$
$\displaystyle \left ( 0.16 \right )^{2}=0.0256 $  $\displaystyle \Rightarrow 0.0256=\left ( 0.16 \right )^{2}$
$\displaystyle 0.\overline{16}=0.1666....$  $\displaystyle \Rightarrow 0.0256=\left ( 0.16 \right )^{2}$
is the least

Compare $\displaystyle 16.1270 \Box  16.128 $

maths decimal numbers comparing and ordering of decimals more or less comparing decimals

  1. >

  2. =

  3. <

  4. None of these

Show answer
Correct Option: C
Explanation:

$16.128$ ia greater than $16.1270$

Hence Option C

Compare $12.1280\square 12.129$ (using >, <, =)

maths decimal numbers comparing and ordering of decimals more or less comparing decimals

  1. >

  2. <

  3. =

  4. none of these

Show answer
Correct Option: B
Explanation:

$12.1280 < 12.129$
since when thousandth places are compared 8 < 9

Which of the following expressions is true?  

maths decimal numbers comparing and ordering of decimals more or less comparing decimals

  1. 1.3749 < 1.0399

  2. 1.7908 < 1.879

  3. 1.526 < 1.2605

  4. 1.463 < 1.3902

Show answer
Correct Option: B
Explanation:

Option A =1.3749<1.03991.3749<1.0399, it should be 1.3749>1.03991.3749>1.0399

Option B=1.7908<1.8791.7908<1.879, it is true
Option C=1.526<1.26051.526<1.2605 , it should be 1.526>1.26051.526>1.2605
Option D=1.463<1.39021.463<1.3902, it should be1.463>1.39021.463>1.3902
Hence option B is the correct answer