Tag: maths

Questions Related to maths

To convert $\displaystyle ^{\circ}C$ to $\displaystyle ^{\circ}F$ the formula used is

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. $\displaystyle \left(C\times\frac{9}{5}\right)-32$

  2. $\displaystyle \left(C\times\frac{9}{5}\right)+32$

  3. $\displaystyle \left(C\times\frac{5}{9}\right)+32$

  4. none of these

Show answer
Correct Option: B
Explanation:

The conversion formula for celcius to farenheit is 

= $\left( C\times \dfrac { 9 }{ 5 }  \right) +32$
So, correct answer is option B.

Rs. $47$ and paise $50$ can be represented as

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. Rs. $47.50$

  2. Rs. $4.50$

  3. Rs. $4750$

  4. Rs. $475.0$

Show answer
Correct Option: A
Explanation:

1 paisa $= 0.01$ Rs


$\Rightarrow$ 50 paise $= 0.50$ Rs

Rs.$47$ and $50$ paise can hence be written as Rs. $47.50$

Express centimeters into meters.
$1458 \ cm$

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. $14.58$m

  2. $1.458$m

  3. $1458$m

  4. $0.1458$m

Show answer
Correct Option: A
Explanation:

$1$m $= 100$cm


$\Rightarrow 1$cm $= 0.01$m
     $1458$cm $= 14.58$m

Express the following as rupees using decimals:
$235$ paise


Rs.$2.35$

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

As we know,


$1 Rs = 100$ paisa


Given, $235$ paisa
So, $235 paisa = \dfrac{235}{100}$ Rs
                         $= 2.35 Rs$

Prerna has Rs. $5000$. She bought $2$ boxes of chocolates for Rs. $52.98$ each, $3$ packets of chips for Rs. $12.98$ each and $2$ books for Rs. $300.05$ each. How much money left with her?

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. Rs. $4255$

  2. Rs. $4750$

  3. Rs. $4000$

  4. Rs. $3875$

Show answer
Correct Option: A
Explanation:

Total expenditure $=Rs. ((2\times 52.98)+(3\times 12.98)+(2\times 300.05))$
$=Rs. (105.96+38.94+600.10)=Rs. 745$
Amount of money left with her$=Rs. (5000-745)=Rs. 4255$.

Rahul purchased $4$kg $500$g rice, $5$kg $650$g sugar and $12$kg $600$g atta. The total weight of his purchases was __________.

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. $10.150$kg

  2. $22.750$kg

  3. $25.350$kg

  4. $18.250$kg

Show answer
Correct Option: B
Explanation:

Weight of rice $=4$kg $500$g $=4.500$kg
Weight of sugar $=5$kg $650$g $=5.650$ kg
Weight of atta $=12$kg $600$g $=12.600$ kg
$\therefore$ Total weight of all items $=(4.500+5.650+12.600)$kg
$=22.750$kg.

Fill in the banks: 
$88\, cm =...................... meter$

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. $0.88$

  2. $0.66$

  3. $0.55$

  4. $0.99$

Show answer
Correct Option: A
Explanation:

$1$ meter $= 100$ cm


So, $88 \,  cm =$ $\dfrac{88}{100}  \, meter$

$= 0.88$ meter

A road is $4$ km $ 800$ m long. If trees are planted both its sides at intervals of $9.6$ m, how many trees were planted?

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. $400$

  2. $500$

  3. $700$

  4. $1000$

Show answer
Correct Option: B
Explanation:

Total length $=4.8$kms $=4800$m


Interval $=9.6$ m

Number of trees planted $=\dfrac{4800}{9.6}=500$

Abhishek has Rs. $817.45$. He bought toys for Rs. $538.30$. The balance amount left with Abhishek is ___________.

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. Rs. $279.30$

  2. Rs. $265.45$

  3. Rs. $279.15$

  4. Rs. $315.82$

Show answer
Correct Option: C
Explanation:

Amount of money Abhishek had $=Rs. 817.45$
Amount of money spent by him on toys $=Rs. 538.30$
$\therefore$ Amount of money left with him $=Rs. (817.45-538.30)=Rs. 279.15$.

Mohan bought $500$ g of cabbage, $250$ g of onions, $750$ g of potatoes, $600$ g of apples.
Calculate total weight in kilograms.

maths fraction one fraction, many forms use of decimals in measure of length decimal fractions in the units of currency, length, weight, capacity

  1. $2100$kg

  2. $21.00$kg

  3. $2.100$kg

  4. $0.2100$kg

Show answer
Correct Option: C
Explanation:
Weight of cabbage is $500$ gm

Weight of onions is $250$ gm

Weight of potatoes is $750$ gm

Weight of apples is $600$ gm

Total weight of fruits and vegetables in grams is:

$500+250+750+600=2100$ gm

We know that $1$ kg $=1000$ gm

Therefore, $2100$ gm can be converted in kgs as follows:

$\dfrac {2100}{1000}=2.100$ kg

Hence, the total weight is $2.1$ kg.