Maths MCQs - Page 5 of 6 - Digital Discite

Two numbers are in the ratio 5:4 and their difference is 10.What is the largest number?

A. 40
B. 50
C. 60
D. 30

Answer

B. 50

Solution

Let the the two numbers be 5x and 4x, then

the difference of the two numbers will be:

5x-4x=10

x=10

now, let’s find the numbers

5*10

=50

4*10

=40

so, the largest number is 50.

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Two numbers are in the ratio 5:4 and their difference is 10.What is the largest number? Read More »

What is the ratio of Faheem’s salary to Imran’s salary to Naveed’s salary if Faheem makes 80,000 rupees ,Imran 70,000 rupees and Naveed makes 50,000 rupees ?

A. 80:70:60
B. 8:7:5
C. 4:7:5
D. 7:8:5

Answer

B. 8:7:5

Solution

Faheem : Imran : Naveed

80000 : 70000 : 50000

divide all by 10000

8 : 7 : 5

Submitted by: Admin

What is the ratio of Faheem’s salary to Imran’s salary to Naveed’s salary if Faheem makes 80,000 rupees ,Imran 70,000 rupees and Naveed makes 50,000 rupees ? Read More »

Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are:

A. 39, 30
B. 41, 32
C. 42, 33
D. 43, 34

Answer

C. 42, 33

Solution

Let one of the students secure x marks.

then, the other student secures (x+9) marks.

the sum of both their marks is equal to

56% of the sum of both means

56% of x+x+9 (x+9 obtained 56% marks when we both students marks)

(56/100)* x+x+9

so,

x+9=56% of (x+x+9)

x+9=(56/100)*(2x+9)

x+9=(112x+504)/100

100(x+9)=112x+504

100x+900=112x+504

900-504=112x-100x

396=12x

396/12=x

33=x

x=33

so the mark of other student will be

x+9

33+9

Marks obtained by both students are 33 and 42.

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Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are: Read More »

40% of a number is more than 20% of 650 by 190. Find the number?

A. 600
B. 700
C. 800
D. 900

Answer

C. 800

Solution

Let the number be x.

40% of a number means: (40/100) * x

20% of 650 means: (20/100)*650

by means = 190

So,

(40/100)*x is more than (20/100) * 650 means (40/100)*x is higher than (20/100)*650

Therefore,

(40/100)*x-(20/100)*650=190

40x/100-(20*650)/100=190

2x/5-130=190

2x/5=190+130

2x/5=320

2x=320*5

2x=1600

x=1600/2

x=800 (Answer)

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40% of a number is more than 20% of 650 by 190. Find the number? Read More »

A man spends Rs. 3,300/-. This was 75% of his monthly income. His monthly income is ____.

A. 4,000
B. 4,400
C. 4,500
D. 3,500

Answer

B. 4,400

Solution

Man spends 3300 rupees which is equal to 75% of his monthly income.
This entails that man used 3/4 of income of his income and 25% of his income is remaining.
So, divide 3300/3=1100
multiply 1100 x 4 = 4400 (Answer)

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A man spends Rs. 3,300/-. This was 75% of his monthly income. His monthly income is ____. Read More »

Ghafoor went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?

A. Rs. 15
B. Rs. 15.70
C. Rs. 19.70
D. Rs. 20

Answer

C. Rs. 19.70

Solution

Let the amount of taxable purchases be $Rupees$ $:$ $x$

Given, 6% of $x = 30 p a i s a = 100/ 30 Rupees$

$\Rightarrow x = (30/100 \times100/6) = 5$

$\Rightarrow$ Cost of tax free items: $[25 - (5 + 0.30)]$

$R s . 19.7 0 (Answer)$

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Ghafoor went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items? Read More »

Ramees buys good worth Rs. 6650. He gets a rebate of 6% on it. After getting the rebate, he pays sales tax @ 10%. Find the amount he will have to pay for the goods.

A. Rs. 6876.10
B. Rs. 6999.20
C. Rs. 6654
D. Rs. 7000

Answer

A. Rs. 6876.10

Solution

Rebate=6%
MP=Rs.6650

SP=94%×6650
SP=(94/100) x 6650
SP=6251 rupees

Since, Sales tax=10%

Total amount Ramees will have to pay:-

=10% × 6251 + 6251
=Rs.(625.1+6251)
= Rs.6876.10 (Answer)

Submitted by: Admin

Ramees buys good worth Rs. 6650. He gets a rebate of 6% on it. After getting the rebate, he pays sales tax @ 10%. Find the amount he will have to pay for the goods. Read More »

The population of a town increased from 1,75,000 to 2,62,500 in a decade. The average percent increase of population per year is:________?

A. 4.37%
B. 5%
C. 6%
D. 8.75%

Answer

B. 5%

Solution

Percentage increase in population in 10 years
= [(262500-175000)/175000 ] x 100
= 50%
Thus, average increase in population per year = 5% (Answer)

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The population of a town increased from 1,75,000 to 2,62,500 in a decade. The average percent increase of population per year is:________? Read More »

The average of two numbers is XY.If one number is equal to X ,the other number is equal to_________?

A. X
B. 2Y
C. XY-X
D. 2 XY -X

Answer

D. 2 XY -X

Solution

x and y are two numbers.

(x+y)/2=xy (average of two numbers)

If one number is equal to x, then

other number will be,

(x+y)/2=xy

x+y=2xy

y=2xy+x (Answer)

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The average of two numbers is XY.If one number is equal to X ,the other number is equal to_________? Read More »

The temperature at noon in LHR ,Pakistan was 6 deg on Monday ,4deg on Tuesday,2deg below zero on Wednesday,3deg below zero on Thursday, 0 deg on Friday ,3 deg on Saturday ,and 6 deg on Sunday. What was the average temperature at noon for the week ?

A. 14 deg
B. -2 deg
C. 2 deg
D. 7 deg

Answer

C. 2 deg

Solution

The temperature on Monday= 6

The temperature on Tuesday= 4

The temperature on Wednesday= -2

The temperature on Thursday= -3

The temperature on Friday= 0

The temperature on Saturday= 3

The temperature on Sunday= 6

Number of Days=7

So, the average temperature for the week will be:

=(6+4+(-2)+(-3)+0+3+6)/7

=2 degree

Submitted by: Admin

The temperature at noon in LHR ,Pakistan was 6 deg on Monday ,4deg on Tuesday,2deg below zero on Wednesday,3deg below zero on Thursday, 0 deg on Friday ,3 deg on Saturday ,and 6 deg on Sunday. What was the average temperature at noon for the week ? Read More »