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21. 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. What are the marks obtained by them?
Answer: Option B
Explanation:Lets assume first student secured x marks.
So second student will secured (x + 9).
Sum of both students marks = x + (x + 9) = (2x + 9)
As per Question, (x + 9) was 56% of the sum of their marks.
So, (x+9) = 56/100(2x+9)
=> (x+9) = 14/25(2x+9)
=> 25x + 225 = 28x + 126
=> x = 33.
So, (x + 9) = 33 + 9 = 42
Hence, their marks are 33 and 42 respectively.
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Tags: Infosys
22. In an election between two candidates first candidate got 60% of votes polled and second Candidate got 280 votes. The total number of votes polled was?
Answer: Option B
Explanation:Let's assume total polled votes = 100 %,
Given, First person got 60%
So, second person get votes = 40 % (remaining votes)
than 40 % = 280
40% = 40*7 = 280
100% = 100*7 = 700 votes
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Tags: Infosys
23. A person run from A to B.He took 1/4 of the time less to reach B when compare to run at normal Speed.Then how many percentage he has increased his speed?
Answer: Option C
Explanation:1-(1/4)=(3/4),then reverse it.
so it is 4/3=1.333,1.33-1=33.33
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Tags: TCS
24. A report consists of 20 sheets each of 55 lines and each such line consists of 65 characters. This report is retyped into sheets each of 65 lines such that each line consists of 70 characters. The % reduction in the number of sheets is closest to
Answer: Option A
Explanation:Given, 20 sheets each of 55 lines and each such line consists of 65 characters. (Condition 1st)
20 sheets, 55 lines and 65 characters = 20*55*65 = 71500 char.
65 lines such that each line consists of 70 characters (Condition 2nd)
So, x sheets,65 lines and 70 characters = x*65*70 char.
Given: This report is retyped
=> x*65*70 = 71500
=> x = 16 sheet.
So reduction %: ([(20-16)*100]/20) *100 =20%
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Tags: TCS
25. (a% of a) + (b% of b) = 2% of ab, then what percentage of a is b?
Answer: Option C
Explanation:Acc. to the question we have to find b/a
Given a*a/100 + b*b/100 =2ab/100 or a^2+b^2=2ab or (a-b)^2 =0
By Solving we will get a=b
Hence b/a= 1 or 100%
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Tags: TCS
26. P is thirty percentage of Q, Q is twenty percentage of N. M is fifty percentage of N, Find the value of P/N.
Answer: Option D
Explanation:P=(30/100)of Q
P=(30/100)*(20/100)of M
p=(30/100)*(20/100)*(50/100)of N
=>p=(30/100)*(20/100)*(50/100)*N
=>P/N=3/100
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Tags: TCS
27. The value of a scooter depreciates in such a way that its value of the end of each year is 3/4 of its value of the beginning of the same year. If the initial value of the scooter is Rs.40,000, what is the value at the end of 3 years ?
28. In a team of 12 persons, 1/3 are women and 2/3 are men. To obtain a team with 20% women how many men should be hired?
Answer: Option C
Explanation:Women = 12(1/3) = 4
so, men = 12-4 = 8
if team needs 20% of women then men Will be 80%
consider u want to hire "x" men
so, (12+x)(80/100) = 8 + x
so, x= 8
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Tags: IBM
29. In a bank 60 percent employees are men.80%men and 20%women belong to retirement plan. what percent of people belong to retirement plan?
Answer: Option B
Explanation:60% employees are men => 40% are women.
80% of 60 % men is 48% and 20% of 40% women is 8%.
so total is 48+8=56%.
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Tags: IBM
30. In an exhibition, the entrance ticket for Kids was Rs.16 and Rs.20 for adults. Every year, adult's cost increases by 25% more than kid's increase rate which is 25%. What will be the difference of their ticket cost after 2 years?
Answer: Option C
Explanation:Kids= 16Rs, after 1 year= 1.25* 16= 20Rs, again after 1 year= 1.25* 20= 25Rs
Adults= 20Rs After 1 yr= 1.50* 20= 30Rs , Again after 1 yr= 1.50*30 =45 Rs
So difference is= 45-25= 20 Rs.
When kids fare increases by 25% so adults fare increases by 25+25 i.e =50%
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Tags: IBM