1. There are four numbers whose product is 9261000 and each of these four numbers is formed by 3 distinct prime numbers. The average of all the four numbers is:
(a) 61.75
(b) 67.25
(c) 82.33
(d) Data insufficient
2. A number is such that when it is multiplied by 8, it gives another number which is as much above from 270 as the original number (itself) is below 270. The average of the original number and the resultant number is:
(a) 33.75
(b) 190
(c) can’t be determined
(d) None of these
3. In the above question (no. 2) the average of the original no. and 270 is:
(a) 165
(b) 185
(c) 135
(d) None of these
4. In a particular week the average number of people who visited the Tajmahal is 40. If we exclude the holidays then the average is increased by 16. Further if we exclude also the day on which the maximum number of 112 people visited the Tajmahal, then the average becomes 42. The number of holidays in the week is:
(a) 1
(b) 2
(c) 3
(d) Data insufficient
5. The average age of all the 20 students of a class is 24. The minimum age of a student is 18 and the maximum age of another student in the same class is 30 years. When the two students whose average age was 26 years resticated from the class but later on one of the rusticated student was readmitted. Now the average age of the class is:
(a) 23.89 years
(b) 28.39 years
(c) 25 years
(d) can’t be determined
6. In a set of prime and composite numbers, the composite numbers are twice the number of prime numbers and the average of all the numbers of the set is 9. If the number of prime numbers and composite numbers are exchanged then the average of the set of numbers is increased by 2. If during the exchange of the numbers the average of the prime numbers and composite numbers individually remained constant, then the ratio of the average of composite numbers to the average of prime numbers (initially) was:
(a) 7/13
(b) 13/7
(c) 9/11
(d) None of these
7. The total age of all the guests in the party was 540 years. If a South Indian couple (guests) left the party, then the average of the remaining guests still remained unchanged, where the age of both the husband and wife (the South Indian couple) was same, then the average age of this couple and the total number of guests in the party, respectively, can be:
(a) 18, 27
(b) 20, 27
(c) 15, 38
(d) Can’t be determined
8. In the command hospital Lucknow the sum of the ages of all the 29 people i.e., physicians, surgeon and nurses is 696. If the age of each physician, each surgeon and each nurse be 1 year, 6 years and 3 years more, then the average age of the whole staff would have been 3 years more. If the number of surgeon is a square root of a two digit number which is also a perfect cube, then the number of nurses in the hospital is:
(a) 12
(b) 15
(c) 16
(d) None of these
9. The average expenditure of Sarvesh for the January to June is Rs. 4200 and he spents Rs. 1200 in January and Rs. 1500 in July. The average expenditure for the months of February to July is:
(a) 4250
(b) 4520
(c) 4060
(d) None of these
10. The average marks of Sameer decreased by 1, when he replaced the subject in which he has scored 40 marks by the other two subjects in which he has just scored 23 and 25 marks respectively. Later he has also included 57 marks of Computer Science, then the average marks increased by 2. How many subjects were there initially?
(a) 6
(b) 12
(c) 15
(d) Can’t be determined
Note : Answers will be updated soon....
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