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71 / 127
martha was supposed to multiply the number of cans sold with the price of one can to ascertain the amount earned by her, Instead of taking 41 as the number of cans , she wrote 14 by mistake . As a result the product went down by 135. What is the other multiplier
A5
B7
C9
D12
Answer: Option A
Explanation:Lets assume multiplier = x
So, 41x=14x+135
=> 27x = 135
=> x = 5
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72 / 127
A store has a banner of 25% off on MRP of all branded items. Sheetal goes into the store and buys a belt worth Rs. 75, a shirt of Rs. 1,999 and a shawl of Rs. 2,900. How much amount will she have to pay?
ARs. 1243.50
BRs. 1240
CRs. 3,700
DRs. 3,730.50
Answer: Option D
Explanation:The discount is 25% so she has to pay 75% of the total bill.
Total = (75+1999+2900)=4974
Now, 75/100*4974= Rs. 3730.50
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73 / 127
what is least perfest square. which is divisible by 24, 30,60?
A1600
B3600
C14400
D32400
Answer: Option B
Explanation:lcm of 24,30,60 is 120
The least prefect square divided by 24,30 60 is 3600
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74 / 127
A content manager is working on an excel sheet. She has 6 columns in the sheet- A,B,C,D,E and F. She has to check that no two columns should have the same entry. She can check only 2 columns at a time. How many times will she have to repeat the comparing process to complete the process for the whole file?
A7
B8
C15
D10
Answer: Option C
Explanation:Columns- A B C D E F
No. of comparisons for each column from left to right- 5 4 3 2 1 0
5+4+3+2+1+0=15
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75 / 127
A long distance train is scheduled to reach its destination in 19 hours. After 10 hours of journey, due to disruption of rail traffic, the train has to be stationed for 1 hour. If the average speed of the train is 100km/hr, at what speed should it travel to cover the distance in same amount of time?
A110 km/hrs.
B110.5 km/hrs.
C112.5 km/hrs.
D112 km/hrs.
Answer: Option C
Explanation:Total distance = 100*19=1900 km.
Distance travelled in 10 hr = 1000 km.
Remaining distance = 900 km.
So, speed = 900/(19-11)= 112.5km/hr
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76 / 127
A bread making machine can be make bread of 50 kg dough in 3 minutes. How many such machines are required to make breads of 300kg dough in 6 minutes
A6
B3
C4
D5
Answer: Option B
Explanation:Lets assume x machine required to make breads of 300 kg dough in 6 min.
Note: (u) means up arrow and (d) means down arrow.
Machine bread Time
-------------------------------
1(d) 50 kg. (d) 3 min. (u)
x 300 kg. 6 min.
=> x/1 = 300/50 * 3/6
=> x = 3 Machine
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77 / 127
Which one of the following numbers is exactly divisible by 11?
A235641
B245642
C315624
D415624
Answer: Option D
Explanation:Note: If the difference of the sum of digits at odd places and the sum of its digits at even places, is either 0 or divisible by 11, then clearly the number is divisible by 11. [(Sum of digits at odd places) - (Sum of digits at even places)]/11.
4+5+2 = 11 and 1+6+4 = 11 . Then 11-11 =0.
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78 / 127
What should be multiplied to 2880 to make it a perfect square?
A3
B5
C2
DNone of these
Answer: Option B
Explanation:Note: To make perfect square, all the powers of prime factors should be even.
2880 = 2^6 * 3^2 * 5
So, In 2880 powers of prime factors 2 and 3 are even.
But power of prime factor 5 is 1, which is odd.
So, to make it a perfect square we need to multiply number by 5.
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79 / 127
A software engineer creates a LAN game where an 8 digit code made up of 1,2,3,4,5,6,7,8 has to be decided on, universal code . There is a condition that each number has to be used once and no number can be repeated . What is the probability that first 4 digits of the code are even numbers ?
A1/70
B1/840
C1/8
D1/40320
Answer: Option A
Explanation:Here is no explanation for this answer
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80 / 127
The probability of getting at least one tail in 5 throws of a coin is?
A1/32
B1/5
C31/32
DNone of these
Answer: Option C
Explanation:A coin throws 5 times <=> 5 coins throws at one time.
So total no of choices are 2^5 = 32
Chances that not getting at least one tails is 1 (h,h,h,h,h)
So 1-(1/32)=31/32
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