Questions Of 21st October 2023
1) A pipe can empty a cistern in 20 minutes. Find the time in which 3/4 part of the cistern will be emptied.
Answer Is: (D) 15 min
Explanation:
We have 1/20 part of the cistern emptied in 1 minute
=> 3/4 of the cistern will be emptied in 20 x 3/4 = 15 minutes.
2) In the given series, can you find the Missing number ?
89, 66, X , 20, -3
Answer Is: (D) 43
Explanation:
The given series is 89, 66, X , 20, -3
Consecutive numbers decreases by 23
Following this pattern, the Missing Number X should decrease by 23 from the previous number.
When we subract 23 to the number before X
We get 66 - 23 = 43
3) What is 12.25% of 2000?
Answer Is: (C) 245
Explanation:
12.25% of 2000 = (12.25/100 ) x 2000 = 245
5) Mr. Win can complete 40 % of the work in 12 days. Calculate the total number of days he takes to complete the work ?
Answer Is: (D) 30 days
Explanation:
40 % of the work is completed in 12 days
No of days taken to complete 100% of work is=> (100/40) x 12 = 30 days
6) Mr. A and Mr. B can do a piece of work in 8 and 12 days respectively. If both of them work together, in how many days the work will get completed ?
Answer Is: (C) 24 / 5 days
Explanation:
A 's 1 day work = 1/8
B's 1 day work = 1/12
When both work together, 1 day's work = (1/8) + (1/12) = (3+2) / 24 = 5 / 24
Number of days to complete the work will be 24 / 5 days
7) Evaluate the Expression : 30% of 1090 + 25% of 970
Answer Is: (A) 569.5
Explanation:
30% of 1090 = 327 25% of 970= 242.5 Adding the above 2 results, we get 327+242.5 = 569.5
8) Find the Missing number in the the below series
107, 134, 161, X , 215, 242
Answer Is: (C) 188
Explanation:
The given series is 107, 134, 161, X , 215, 242
Consecutive numbers increases by 27
Following this pattern, the Missing Number X should increase by 27 from the previous number.
When we add 27 to the number before X
We get 161 + 27 = 188
9) A person's salary was reduced by 20%. By what per cent should the salary be increased in order to obtain his original salary?
Answer Is: (D) 0.25
Explanation:
Let the person's original salary be 100 Salary reduced by 20 %, new salary = 80 Rs. To bring back the difference ie., 20Rs, the salary should be increased by (20/80) x 100 = 25 %
10) Vijay requires 40 % to pass. If he gets 185 marks, falls short by 15 marks, what was the maximum marks he could have got?
Answer Is: (A) 500
Explanation:
If Vijay had 15 marks, more he could have secured 40% marks. Now, 15 marks more than 185 = 185 + 15 = 200 Let the maximum marks be k, then 40 % of m = 200 40/100 x m = 200 m=500, thus the maximum mark is 500
11) X,Y,Z complete a given work in 12 , 42 and 28 days respectively. If all three of them work together, in how many days the work will get completed ?
Answer Is: (D) 7 days
Explanation:
X's 1 day work = 1/12
Y's 1 day work = 1/42
Z's 1 day work = 1/28
All three are working together
X+Y+Z 's1 day work = (1/12) + (1/42) + (1/28)
[L C M of 12 , 42 , 28 = 84]
= (7 + 2 + 3) / 84 = 12 / 84
X+Y+Z 's 1 day work = 1/7
X+Y+Z will take 7 days to finish the work
Answer is 7
12) One fill pipe A is 3 times faster than second fill pipe B and takes 32 minutes less than the fill pipe B. When will the cistern be full if both pipes are opened together?
Answer Is: (A) 12 min
Explanation:
Let pipe A takes x minutes to fill cistern
The, pipe B takes 3x minutes to fill the cistern
Given, A takes 32 minutes less than B
=> Time taken by pipe A - Time taken by pipe B = 32 minutes
=> 3x - x = 32 minutes
=> x = 16 mins
=> Time taken by pipe A to fill cistern = 16 mins
Time taken by pipe B to fill cistern= 3x = 3 * 16 = 48 mins
So Time taken by both the pipe to fill cistern
= (48 x 16) / (48 + 16) minutes
= 12 minutes
14) 36 men can complete a work in 18 days. In how many days will 54 men can complete the same work?
Answer Is: (B) 12
Explanation:
Less men means more days ( Inverse proportion) 54 : 36 :: 18 : x => x = (36 x 18) / 54 = 36 / 3 = 12 Required number of days = 12, with 54 people working on it
15) What will come in place of question mark (?) in the following series?
50 67 33 84 16 ?
