Mathematical Series Questions for Competitive Exams

Vikram Singh9 months ago 156.8K Views Join Examsbookapp store google play
mathematical series questions
Q :  Average of five numbers is 20. If each number is multiplied by 2, what will be the new average?

(A) 30

(B) 40

(C) 50

(D) 60

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Correct Answer : B

Q :  The average temperature for Monday, Tuesday and Wednesday was 40 degree Celsius. The average for Tuesday, Wednesday and Thursday was 41 degree Celsius, and that for Thursday being 45 degree Celsius. What was the temperature on Monday?

(A) 42 degree

(B) 50 degree

(C) 45 degree

(D) 40 degree

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Correct Answer : A

Q :  The average weight of a group of boys and girls is 38 kg. The average weight of boys is 42 kg and that of girls is 33 kg. If the number of boys is 25, than the number of girls is…….

(A) 20

(B) 33

(C) 38

(D) 22

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Correct Answer : A

Q :  There are 40 boys in a class and average age of the class is 16 years. A boy of 17 years of age is replaced by another one, as a result average age becomes 15.875 years. Find the age of the new boy?

(A) 12 years

(B) 14.5 years

(C) 15 years

(D) 17 years

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Correct Answer : A

Q :  The average value found for 20 observations was 75. It was noticed later that 97 was read as 79. So, what was the correct average value?

(A) 75.7

(B) 75.8

(C) 75.9

(D) 75.6

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Correct Answer : C

Q :  The average daily income of A, B and C is Rs.450. If the average daily income of A and B is Rs.400. B and C is Rs.430; then the daily income of B will be-

(A) Rs.300

(B) Rs.310

(C) Rs.415

(D) Rs.425

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Correct Answer : B

Q :  The average of three numbers is 40. First of them is two times of the seconds and the second is three time of the third. So, what is the difference between the largest and smallest number?

(A) 30

(B) 36

(C) 46

(D) 60

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Correct Answer : D

Q :  

A, B and C started a business with their investments in the ratio 1 : 2 : 4 . After 6-month A invested the half amount more as before and B invested same the amount as before while C withdrew th of the his investments. Find the ratio of their profits at the end of the year. 

(A) 5 : 12 : 13

(B) 5 : 11 : 14

(C) 5 : 12 : 14

(D) None of these

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Correct Answer : C

Q :  

Out of total capital required to start a business A invested 30 %, B invested and C invested the remaining capital. At the end of one-year sum of Rs. 4000 is earned as a profit which is 20% of the capital given by B, then find how much C invested in the business? 

(A) ₹ 25000

(B) ₹ 10000

(C) ₹ 15000

(D) ₹ 12450

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Correct Answer : C

Q :  

Three partners invested Rs. 42000, Rs. 48000 and Rs. 32000 respectively. partnership condition is that, each will the get interest on his capital at the rate of 7 % p. a. and the remaining profit will be divided in the ratio of their capitals. If at the end of the year the total profit is Rs. 32940, then find the share of A in profit. 

(A) ₹ 12960

(B) ₹ 11340

(C) ₹ 8640

(D) None of these

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Correct Answer : B

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Vikram Singh

Providing knowledgable questions of Reasoning and Aptitude for the competitive exams.

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