Mathematical Series Questions for Competitive Exams
The mode and median of the data 8, 6, 8, 7, 8, 6, 8, 7, 6 is
(A) 7 and 8
(B) 6 and 7
(C) 8 and 7
(D) 6 and 8
Correct Answer : C
The mean of four different observations is 17.5. When a new observation whose value 20 is added, what will be the new mean?
(A) 18
(B) 17.5
(C) 19
(D) 18.5
Correct Answer : A
The median of the number 14, 12, 12, 16, 13 and 18 is:
(A) 13
(B) 14
(C) 14.5
(D) 13.5
Correct Answer : D
The heights of Arun’s family members are given in cm’s as 165, 180, 181, 163, 172, 180, 162 The median height of the family will be
(A) 172
(B) 170
(C) 131
(D) 167
Correct Answer : A
A set of data is given. The mean of the set is 35 while the median is set as 60. Find the mode of the data.
(A) 25
(B) 30
(C) 20
(D) 110
Correct Answer : D
In the following frequency table, the value of H will be
(A) 10
(B) 8
(C) 7
(D) 2
Correct Answer : D
The value of P + Q in the following table is-
(A) 58
(B) 40
(C) 66
(D) 60
Correct Answer : C
Mathematical Series Questions
Q : A alone would take 6 hours more to complete the job than if both A and B would work together. When B worked alone he took 1.5 hours more to complete the job and A and B worked together. How much time they will take if they if they work together?
(A) 3 hours
(B) 4 hours
(C) 4.5 hours
(D) 5 hours
(E) None of these
Correct Answer : A
Gopal and Ravi contracted a work for Rs 480. If Gopal can do that work in 15 days and Ravi can complete that same work in 10 days. He completed this work with Mahesh in 5 days, then tell me how much money Mahesh got.
(A) Rs.80
(B) Rs.120
(C) Rs.160
(D) Rs. 40
Correct Answer : A
If efficiency of B increased by $$ {33{1\over 3}{\%}}$$ and A and B start work together, while at the same time C starts destroying the work. Find in how many days work will be completed?
(A) 36 days
(B) 48 days
(C) 32 days
(D) 28 days
(E) 30 days
Correct Answer : A
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Vikram Singh
Providing knowledgable questions of Reasoning and Aptitude for the competitive exams.
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