Tech Mahindra Aptitude Test Question with Answers
21 / 430
Anil invests an amount for 2 years at the rate of 15% per annum at simple interest.Had he invested in a scheme in which interest was compounded yearly he would have got Rs.450 more. Find the principal:
ARs.8,000
BRs.15,000
CRs.20,000
DRs.10,000
Answer: Option C
Explanation:Lets assume D amount difference between compound and simple interest for 2 years, D=P*(R/100)^2
where P is the principal
R is rate of interest
so here,
450 = P*(15/100)^2 => P= Rs. 20000
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22 / 430
The sum of odd number between 20 and 30 is
A125
B140
C120
D105
Answer: Option A
Explanation:a = 21,l = 29 Clearly n = 5;
sum = n(a+l)/2 = 5*(21+29)/2 = 125
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23 / 430
At what time between 4 and 5 o'clock will the hands of a watch point in opposite directions?
A54 past 4
B(53 + 7/11) past 4
C(54 + 8/11) past 4
D(54 + 6/11) past 4
Answer: Option D
Explanation:4 o'clock, the hands of the watch are 20 min. spaces apart.
To be in opposite directions, they must be 30 min. spaces apart.
So, Minute hand will have to gain 50 min. spaces.
55 min. spaces are gained in 60 min
50 min. spaces are gained in (60/55 +50) min. or 54 6/11
Required time = 54 6/11 min. past 4.
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24 / 430
A college starts from 10 AM continues till 1:30 PM. In this duration there are five periods. If 5 minutes are provided before each period to leave the room and enter the other, then what is the duration of each period?
A38 min
B41 min
C40 min
D42 min
Answer: Option A
Explanation:four 5 minutes breaks are needed so 4*5=20min
total duration is 210 minutes
duration left : 210-20 = 190
duration of each period: 190/5 = 38 min.
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25 / 430
A clerk multiplied a number by ten when ten should have divided it. The answer he got was 100.what should the answer have been?
A3
B1
C2
D4
Answer: Option B
Explanation:let no. be x
x*10=100
=> x=10
he has multiply by 10
so ans is 10/10=1
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26 / 430
At what time between 9' O clock and 10' O clock will the hands of a clock point in the opposite directions?
A2 2/11 minutes past 10' O clock
B16 4/11 minutes past 9
C2 2/11 minutes past 9
D16 4/11 minutes past 10' O clock
Answer: Option B
Explanation:Here is no explanation for this answer
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27 / 430
The age of Ritu's mother is 6 times that of Ritu's age. After 6 years it will be 3 times that of Ritu's age. what is Ritu's present age?
A4 years
B8 years
C6 years
D10 years
Answer: Option A
Explanation:Lets assume Ritu age = x years.
So Ritu's mother age = 6x
After 6 years. 3(x+6)= (6x+6)
3x + 18 = 6x+6
=> 3x = 12 => x = 4 years.
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28 / 430
In a game of 80 points. A can give B 5 points and C 15 points. Then how many points B can give C in a game of 60?
A9 points
B6 points
C8 points
D10 points
Answer: Option C
Explanation:A can give B 5 points A / B = 80/75
A can give C 15 points A / C = 80/ 65
B can give C a points of ( B / A ) * ( A / C)
(75 / 80) * ( 80 / 65)
(75 / 65) = 15/13
Need to be find in a game of 60 , so multiply numerator and denominator with 4 such that the ratio becomes 60/52
Therefore B can give C of (60-52) = 8 points
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29 / 430
If the compound interest (compounded Yearly) on a certain sum for 2 years at 3% is Rs.101.50 then what will be the corresponding simple interest?
ARs.98.25
BRs.100.00
CRs.90.00
DRs.95.50
Answer: Option B
Explanation:Given, years = 2
3% of 50= (50*(3/100))=Rs.1.5
Simple Interest =50+50=100
Compound Interest=50+50+1.5=101.5
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30 / 430
In what ratio must water be added to 10 liters of milk at Rs.20 per liter so that cost of mixture is Rs.16 per liter?
A3:2
B1:4
C2:3
D4:1
Answer: Option B
Explanation:10 lit milk cost 20 Rs For 1Rs, Milk = 1/2 lit
For 16Rs, Milk = (1/2)*16 = 8 lit (Milk)
Total quantity should be 10 litres.
so 10 - 8 = 2 lit ( water have to add)
Now ratio = 2(water) : 8(Milk) = 1:4
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