Quantitative Aptitude Questions for RBI Grade-B Phase-1 Exam

Q1. The average marks of the girls in a class is equal to the number of boys and the average marks of boys is equal to the number of girls. If the class average is 4 less than the average of both the boys’ and the girls’ average marks, what will be the number of students in the class?
(a) 24
(b) 48
(c) 50
(d) 64
(e) None of these 

Q2. I was born 30 years after my father was born. My sister was born 25 years after my mother was born. The average age of my family is 26.25 years right now. My sister will get married 4 years from now and will leave the family. Then the average age of the family will be 107/3 years. What is the present age of my father? 

(a) 30 year
(b) 35 year
(c) 40 year
(d) 45 year
Q3.  Rahul, Vinod and Ravi have a total of 80  coins among them. Rahul triples the number of coins with the others by giving them some coins from his own collection. Next, Vinod repeats the same process. After this Vinod now has 20 coins. Find the number of coins Vinod had at the beginning?
(a) 22
(b) 25
(c) 16
(d) 20
(e) none of these
Q4. The weight of the body as calculated by the average of seven different experiments is 53.735 gram. The average weight of the first three experiments is 54.005 gm. And that of the fourth is 0.004 gm greater than the fifth, which the average of the sixth and the seventh Experiments was 0.010 gm less than the average of the first three. Find the weight of the body obtained by the fifth experiment.
(a) 49.353 gm
(b) 49.349 gm
(c) 53.072 gm
(d) 53.068 gm
(e) none of these
Q5.  A and B have some guavas divided between themselves. A says to B “If I give you 25% of the guavas I have, I will still have 2 more guavas than you have”. To this, B says, “ If you give me guavas equal to 70% of what I have now, I will have four more guavas than you have.”  What is the total number of guavas that they have?
(a) 80 
(b) 64
(c) 36
(d) 88
(e) None of these
Directions (Q. 6 - 10): In each of these questions, two equations (I) and (II) are given. You have to solve both the equations and give answer
(a) if x>y
(b)  if x≥y
(c) if x<y
(d) if x ≤y
(e) if x = y or no relation can be established between x and y

Directions (Q.11-15): What should come in place of the question mark (?) in the following series?

Q11. 2, 3, 8, ?,112, 565
(a) 36
(b) 14
(c) 27
(d) 45
(e) None of these
Q12. 6, 4, 8, 23, ?, 385.25
(a) 84.5
(b) 73
(c) 78.5
(d) 82
(e) None of these
Q13. 400, ?, 320, 192, 76.8, 15.36
(a) 360
(b) 380
(c) 375
(d) 390
(e) None of these 
Q14. 85, 43, 15, 4.5, ?
(a) 1.5
(b) 1.6
(c) 1.7
(d) 1.8
(e) 1.9
Q15. 12,  30,  60,  108,  180,  282,  ?
(a) 366
(b) 420
(c) 444
(d) 496
(e) 504

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