Page 13 - GMAT 2017b_Neatb

Quantitative Reasoning Test 1

10. A number is increased by 20% and then decreased by (A) 55 kg
20%, the final value fo the number. (B) 60 kg
(A) does not change ( C) 45 kg
(B) decreases by 2% (D) 40 kg
( C) increases by 4%
(D) None of these 18. The average monthly salary of a staff of 9 persons is
N2,450. One member of the staff whose monthly
11. A man’s wages were decreased by 50%. Again, the salary is N2,650 is transferred. Find the average salary
reduced wages were increased by 50%. He has a loss of of the remaining 8 persons of the staff.
(A) 25% (A) N2,425
(B) 25% (B) N2,625
( C) 20% ( C) N3,025
(D) None of these (D) N2,825

12. In a class of 20 students in an examination in 19. The mean marks of 10 boys in a class is 70% whereas
Mathematics 2 students scored 100 marks each, 3 got the mean marks of 15 girls is 60%. The mean marks of
zero each and the average of the rest was 40. What is the all the 25 students is
average of the whole class? (A) 64%
(A) 40 marks (B) 60%
(B) 35 marks ( C) 55%
( C) 32 marks (D) 52%
(D) 45 marks
20. The average income of A for 15 days is N70. The
13. The average weight of 24 students of section A of a class average for first five days is N60 and that for the last
is 58 kg whereas the average weight of 26 students of nine days is N80. The income for the sixth day is
section B of the same class is 60.5 kg. Find the average (A) N80
weight of all the students of the class. (B) N60
(A) 57.4 kg ( C) N40
(B) 59.3 kg (D) N30
( C) 58.9 kg
(D) 59.7 kg 21. The average of five consecutive even numbers
starting with 4, is
14. The average age of 5 members is 21 years. If the age of (A) 6
the youngest member be 5 years, find the average age of (B) 7
the family at the birth of the youngest member. ( C) 8
(A) 24 years (D) 7.5
(B) 25 years
( C) 20 years 22. 3 years ago the average age of a family of 5 members
(D) 28 years was 17 years. With the birth of a new baby, the average
remains the same even today. Find the age of the baby.
15. The average of 7 numbers is 5. If the average of first six (A) 1 year
of these numbers is 4, the seventh number is (B) 3 years
(A) 14 ( C) 2 years
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(B) 12 2
( C) 11 (D) 2 years
(D) 15
23. Three numbers A, B and C are in the ratio of 12 : 15 :
16. Three years ago the average age of a family of 5 25. If sum of these numbers is 312, find the ratio
members was 27 years. On the addition of a child to the between the difference of B and A and the difference of
family, the present average age of the family is still 27 C and B.
years. Find the present age of the child. (A) 3 : 7
(A) 16 years (B) 10 : 3
(B) 12 years ( C) 3 : 10
( C) 24 years (D) None of these
(D) 20 years

17. The average weight of 10 students is increased by half a
kg when one of the students weighing 50 kg is replaced
by a new student. Find the weight of the new student.
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