Directions (1-4): What value should come in the place of question mark (?) in the following number series?

1. 15, 21, 31, 45, ?
61
62
64
73
63
Solution:

2. 39, 48, 66, 93, 129, ?
171
178
164
174
163
Solution:

3. 274, 137, 68, 33, 15, ?
5.5
4.5
5
3.5
4
Solution:

4. 11, 36, 104, 317, ?
963
958
945
973
963
Solution:

5. In a class, 8% of total students are interested in Football. Four-fifth of total students are interested in Cricket. 10% of total students are interested in Basketball and remaining 20 students are not interested in any games. How many students are there in the class?
850
800
900
950
1000
Solution:

6. A cycle is sold at a profit of 15%. If both the cost price and selling price is decreased by Rs. 200 the profit would be 5% more what is the original cost price of cycle?
Rs. 1200
Rs. 1000
Rs. 800
Rs. 600
None of these
Solution:

7. A person lends Rs. 4200 to 'A' for 3 years and Rs. 6500 to 'B' for 7 years. If the person gets Rs. 8134 as interest then what is the rate of interest per annum ?
6%
8%
10%
12%
14%
Solution:

8. A sum amounts to Rs. 98010 in 2 years and to Rs. 107811 in 3 years compounded annually. What is the sum?
Rs. 81000
Rs. 84000
Rs. 87000
Rs. 90000
Rs. 94000
Solution:

9. How many different words can be formed with the letters of the word ''BREAKING", so that the words begin with 'B' and end with 'G' ?
120
720
5040
2520
1440
Solution:

10. A bag contains 9 white and 7 black balls. Three balls are drawn at random. Find the probability that all the three balls are black?
1/8
1/12
1/16
1/21
None of these
Solution: