RBI GRADE ‘B’ OFFICER’S EXAM Held on : 2007 (Part-III)

1. What should come in place of the question mark (?) in the following number series ?

104 109 99 114 94 ?

Correct Answer: (5) None of these

Solution:The given series is based on
the following pattern :

Hence, 119 will come in place of the question mark.

2. What should come in place of the question mark (?) in the following number series ?

980 392 156.8 ? 25.088

Correct Answer: (3) 62.72

Solution:The given series is based on the following pattern :

Hence, 62.72 will come in place of the question mark.

3. What should come in place of the question mark (?) in the following number series ?

14 16 35 109 441 ?

Correct Answer: (4) 2211

Solution:The given series is based on the following pattern :

Hence, 2211 will come in place of the question mark.

4. What should come in place of the question mark (?) in the following number series ?

1331 2197 4913 6859 ? 24389

Correct Answer: (1) 12167

Solution:The given series is based on the following pattern :
Numbers are cubes of consecutive prime numbers.

i.e.

$1 1^{3} = 1331$

$1 3^{3} = 2197$

$1 7^{3} = 4913$

$1 9^{3} = 6859$

$2 3^{3} = 12167$

$2 9^{3} = 24389$

Hence, 12167 will come in place of the question mark.

5. What should come in place of the question mark (?) in the following number series ?

3600 725 150 35 12 ?

Correct Answer: (2) 7.4

Solution:The given series is based on the following pattern

Hence, 7.4 will come in place of the question mark.

6. Answer the questions given below based on the following data.

A total of 250 students of a class play different games viz. Football, Hockey, Chess, Badminton, Table Tennis and Tennis. The ratio of girls to boys in the class of 250 is 13 : 12 respectively. 50% of the girls play Table Tennis and Badminton only. 20% of the boys play Football, Hockey and Tennis only. 15% of the boys play Tennis and Chess only. The ratio of number of girls to boys playing Tennis and Chess only is 2 : 3 respectively. 30% of the girls play Hockey and Chess only. 10% of the girls play Chess, Badminton and Table Tennis only. The remaining girls play only Football. Boys playing Table Tennis and Badminton only is 20% of the girls playing the same. 40% of the boys play only Football. The remaining boys play only Chess.

What is the total number of students playing Football?

Correct Answer: (4) 73

Solution:Number of students playing
Football = 48 + 24 + 1 = 73

7. Answer the questions given below based on the following data.

A total of 250 students of a class play different games viz. Football, Hockey, Chess, Badminton, Table Tennis and Tennis. The ratio of girls to boys in the class of 250 is 13 : 12 respectively. 50% of the girls play Table Tennis and Badminton only. 20% of the boys play Football, Hockey and Tennis only. 15% of the boys play Tennis and Chess only. The ratio of number of girls to boys playing Tennis and Chess only is 2 : 3 respectively. 30% of the girls play Hockey and Chess only. 10% of the girls play Chess, Badminton and Table Tennis only. The remaining girls play only Football. Boys playing Table Tennis and Badminton only is 20% of the girls playing the same. 40% of the boys play only Football. The remaining boys play only Chess.

How many students play Tennis?

Correct Answer: (5) None of these

Solution:Number of students playing
Tennis = 24 + 18 + 12 = 54

8. Answer the questions given below based on the following data.

A total of 250 students of a class play different games viz. Football, Hockey, Chess, Badminton, Table Tennis and Tennis. The ratio of girls to boys in the class of 250 is 13 : 12 respectively. 50% of the girls play Table Tennis and Badminton only. 20% of the boys play Football, Hockey and Tennis only. 15% of the boys play Tennis and Chess only. The ratio of number of girls to boys playing Tennis and Chess only is 2 : 3 respectively. 30% of the girls play Hockey and Chess only. 10% of the girls play Chess, Badminton and Table Tennis only. The remaining girls play only Football. Boys playing Table Tennis and Badminton only is 20% of the girls playing the same. 40% of the boys play only Football. The remaining boys play only Chess.

How many girls do not play Chess ?

Correct Answer: (1) 66

Solution:Number of girls playing
Chess = 12 + 39 + 13 = 64
Number of girls not playing
Chess = 130 - 64 = 66

9. Answer the questions given below based on the following data.

A total of 250 students of a class play different games viz. Football, Hockey, Chess, Badminton, Table Tennis and Tennis. The ratio of girls to boys in the class of 250 is 13 : 12 respectively. 50% of the girls play Table Tennis and Badminton only. 20% of the boys play Football, Hockey and Tennis only. 15% of the boys play Tennis and Chess only. The ratio of number of girls to boys playing Tennis and Chess only is 2 : 3 respectively. 30% of the girls play Hockey and Chess only. 10% of the girls play Chess, Badminton and Table Tennis only. The remaining girls play only Football. Boys playing Table Tennis and Badminton only is 20% of the girls playing the same. 40% of the boys play only Football. The remaining boys play only Chess.

What is the ratio of number of girls playing Hockey to the number of boys playing Hockey respectively?

Correct Answer: (2) 13 : 8

Solution:Required ratio = 39 : 24
= 13 : 8

10. Answer the questions given below based on the following data.

A total of 250 students of a class play different games viz. Football, Hockey, Chess, Badminton, Table Tennis and Tennis. The ratio of girls to boys in the class of 250 is 13 : 12 respectively. 50% of the girls play Table Tennis and Badminton only. 20% of the boys play Football, Hockey and Tennis only. 15% of the boys play Tennis and Chess only. The ratio of number of girls to boys playing Tennis and Chess only is 2 : 3 respectively. 30% of the girls play Hockey and Chess only. 10% of the girls play Chess, Badminton and Table Tennis only. The remaining girls play only Football. Boys playing Table Tennis and Badminton only is 20% of the girls playing the same. 40% of the boys play only Football. The remaining boys play only Chess.

What is the total number of students playing Badminton?

Correct Answer: (3) 91

Solution:Number of students playing
Badminton = 65 + 13 + 13 = 91