21. Find the compound interest accrued on an amount of Rs.14,800 at 13.5% p.a at the end of two years. (Round off your answer to nearest integer)
A. Rs.4273
B. Rs.4613
C. Rs.4064
D. Rs.4266
✅ The correct answer is option D. Rs.4266.
Mathematics
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22. Find the roots of the quadratic equation: x2 + 2x – 15 = 0?
A. -5, 3
B. 3, 5
C. -3, 5
D. -3, -5
✅ The correct answer is option A. -5, 3.
23. Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern?
A. 90 min
B. 100 min
C. 110 min
D. 120 min
✅ The correct answer is option B. 100 min.
24. Find the cost of Rs. 6400, 10% stock at 15 discount.
A. 5440
B. 5480
C. 6440
D. 6480
✅ The correct answer is option A. 5440.
Cost of Rs. 100 stock = Rs. (100-15)
Cost of Rs. 100 stock = Rs. (100-15)
Cost of Rs. 6400 stock = Rs. (85/100 * 6400 ) = Rs. 5440.
25. How many minimum number’s of whole square slabs are required for paving the floor 12.96 meters long and 3.84 meters side?
A. 216
B. 192
C. 108
D. 256
✅ The correct answer is option A. 216.
26. The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 8% p.a. was Rs.2828.80. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned.
A. Rs.18,828.80
B. Rs.19,828.80
C. Rs.18,028.80
D. Rs.17,828.80
✅ The correct answer is option B. Rs.19,828.80.
27. 18 cattle graze a field in 12 days. 6 cattle can graze 3 of such fields in x days. What is x?
A. 90
B. 72
C. 36
D. 108
✅ The correct answer is option D. 108.
28. 40% of a number is more than 20% of 650 by 190. Find the number?
A. 600
B. 700
C. 800
D. 900
✅ The correct answer is option C. 800.
29. A delegation of 5 members has to be formed from 3 ladies and 5 gentlemen. In how many ways the delegation can be formed, if 2 particular ladies are always included in the delegation?
A. 20
B. 54
C. 42
D. 60
✅ The correct answer is option A. 20.
30. Candidates in a competitive examination consisted of 60% men and 40% women 70% men and 75% women cleared the qualifying test and entered the final test where 80% men and 70% women were successful? Which of the following statements is correct?
A. Success rate is higher for women
B. Overall success rate is below 50%
C. More men cleared the examination than women
D. Both ‘A’ and ‘B’
✅ The correct answer is option C. More men cleared the examination than women.