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Question 1 of 5
1. Question
Bina’s monthly income is 90% of Anita’s monthly income. The total of both their monthly incomes is Mr. Sen’s monthly income. Mr. Sen’s annual income is ₹ 775200. What is Bina’s monthly income?
Correct
Answer: c
Mr. Sen’s monthly income = (Bina +Anita)’s monthly income
= (775200/12) = Rs. 64600
According to the question,
Bina’s monthly income 90% of Anita’s monthly income
(Bina/Anita) =( 90/100) = 9/10
Bina:Anta = 9:10
∴Bina’s monthly salary = (9/19)*64600
= Rs. 30600
Incorrect
Answer: c
Mr. Sen’s monthly income = (Bina +Anita)’s monthly income
= (775200/12) = Rs. 64600
According to the question,
Bina’s monthly income 90% of Anita’s monthly income
(Bina/Anita) =( 90/100) = 9/10
Bina:Anta = 9:10
∴Bina’s monthly salary = (9/19)*64600
= Rs. 30600
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Question 2 of 5
2. Question
Sohan spends 23% of an amount of money on an insurance policy, 33% on food, 19% on children’s education and 16% on recreation. He deposits the remaining amount of 504 in bank. How much total amount does he spend on food and insurance policy together?
Correct
Answer : c
Let total amount be x.
Total expenditure (23 + 33+ 19 + 16)%
of x = 91% of x
Remaining money
= (100 – 91)% of x = 9% of x
According to the question,
9% of x = 504
X= (504/9)*100
=Rs. 5600
Now, total money (food + insurance)%
= (23 + 33)% of x = 56% of x 56% of 5600
= (56/100)´5600=Rs.3136
Incorrect
Answer : c
Let total amount be x.
Total expenditure (23 + 33+ 19 + 16)%
of x = 91% of x
Remaining money
= (100 – 91)% of x = 9% of x
According to the question,
9% of x = 504
X= (504/9)*100
=Rs. 5600
Now, total money (food + insurance)%
= (23 + 33)% of x = 56% of x 56% of 5600
= (56/100)´5600=Rs.3136
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Question 3 of 5
3. Question
In an office, 40% of the staff is female.40% of the female and 60% of the male voted for me. The percentage of votes I got was
Correct
Answer : d
Let total number of staff be 100.
Female staff = 40
Male staff = (100 – 40) = 60
Votes cast by females = (40/100) * 40 = 16
Votes cast by males = (60/100)*60 = 36
Votes cast by both (males + females) = 16 + 36 = 52
∴Percentage votes obtained = 52%
Incorrect
Answer : d
Let total number of staff be 100.
Female staff = 40
Male staff = (100 – 40) = 60
Votes cast by females = (40/100) * 40 = 16
Votes cast by males = (60/100)*60 = 36
Votes cast by both (males + females) = 16 + 36 = 52
∴Percentage votes obtained = 52%
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Question 4 of 5
4. Question
There is a 7-digit telephone number with all different digits. lf the digit at extreme left and extreme right are 6 and 5 respectively, find how many such telephone numbers are possible?
Correct
Answer : c
There is a 7-digit telephone number but extreme right and extreme left positions are fixed
i.e.6xXxXx5
∴Required number of ways
8x7x6 x5x 4= 6720
Incorrect
Answer : c
There is a 7-digit telephone number but extreme right and extreme left positions are fixed
i.e.6xXxXx5
∴Required number of ways
8x7x6 x5x 4= 6720
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Question 5 of 5
5. Question
If 14 men and 12 boys can finish work in 4 days, while 8 men and 16 boys can finish the same work in 5 days. Compare the 1 day work of 1 man and 1 boy.
Correct
Answer :a
Here, a 14, b = 12, x = 4, a =8
b= 16 and y = 5
[(One day work of 1 man )/(One day work of 1 boy)]=[(yb2-xb1)/(xa1-ya2) ……[by Technique 9]
=(5´ 16 – 4 *12)/(4* 14-5 * 8)
= (80-48)/(56-40)=(32/16)=(2/1)
Incorrect
Answer :a
Here, a 14, b = 12, x = 4, a =8
b= 16 and y = 5
[(One day work of 1 man )/(One day work of 1 boy)]=[(yb2-xb1)/(xa1-ya2) ……[by Technique 9]
=(5´ 16 – 4 *12)/(4* 14-5 * 8)
= (80-48)/(56-40)=(32/16)=(2/1)
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