Quantitative Aptitude Quiz For RBI Attendant 2021- 14th March |

Table of Contents

Q1. If average of a 10 term A.P is 112.5% more than its first term then second term of A.P is what % of the sum of the series?

Q2. If the numerator of a fraction is increased by 150% and the denominator of the fraction is decreased by 25%, the resultant fraction is of 8. What is the original fraction?
(a) 2/7
(b) 4/15
(c) 2/9
(d) 4/17
(e) 5/18

Q3. In a university election of two candidates, 80% of the students cast their votes out of which 120 votes are invalid. The winner gets 37.5% of the total students votes and won by only 30 votes. Then find the number of students who don’t cast their votes?
(a)360
(b) 320
(c) 340
(d) 300
(e) 380

Q4. The present age of a father is twice as that of his son. 10 years ago, his age was thrice the age of his son. What will be the ratio of the ages of father and son after 15 years from now?
(a) 7: 11
(b) 19: 5
(c)5: 9
(d) 11: 7
(e) 8:11

Q5. The sum of Ravi’s and Shivam’s age 4 years ago was 80 years. Ravi’s age 14 years ago was equal to Shivam’s age 4 years ago, then find the present age of Ravi ? (in years)
(a) 39
(b) 49
(c) 40
(d) 47
(e) 55

Q6. Average of 8 consecutive odd numbers is 10. What will be the average of smallest 4 numbers out of 8 numbers?
(a) 7
(b) 8
(c) 6
(d) 4
(e) 5

Q7. In a committee of 20 members, the average age is 25 years. The average age of first 18 members is 24 years. What will be the average age of last 2 members?
(a) 32
(b) 36
(c) 38
(d) 34
(e) 30

Q8. Amit opened a workshop by investing Rs. 60000. He invested additional amount of Rs. 8000 at the end of every year. After 2 years Hemant joined him with an amount of Rs. 80000. Thereafter Hemant did not invest any additional amount. Find the difference between their shares in profit, if total profit at the end of 4 years is Rs. 35000.
(a) Rs 10000
(b) Rs 12500
(c) Rs 85000
(d) Rs 75000
(e) Rs 90000

Q9. Three partners A, B and C invested their amounts in ratio of 2 : 5 : 7. At the end of 6 months, ‘A’ added some more amount such that his investment become equals to half of sum of ‘B’ and ‘C’ initial investment. If at the end of the year, B’s share in profit is Rs 4250, then find the total profit?
(a) Rs 12500
(b) Rs 13600
(c) Rs 18400
(d) Rs 10500
(e)Rs 14500

Q10. A mixture of milk and water contains 60% milk and remaining water. How much water should be added (in percentage) in mixture to reverse the proportion of milk and water?
(a) 25%
(b) 37.5%
(c) 62.5%
(d) 75%
(e) 50%

Q11. If simple interest on a certain sum of money for three years is Rs. 450 and the compound interest on the same sum at the same rate for 2 years is Rs. 309, then the principal invested in rupees is :
(a) Rs. 3000
(b) Rs. 1875
(c) Rs. 1500
(d) Rs. 2250
(e) Rs. 2500

Q12. Speed of a boat in still water is 8 km/h. It takes 5 hours to go upstream and 3 hours downstream distance between two points. What is the speed of stream?
(a) 4 km/h
(b) 2 km/h
(c) 3 km/h
(d) 1 km/h
(e) 2.5 km/h

Q14. A man sees a train passing over a bridge of length 1 km. The length of the train is half of the length of bridge. If the train passes the bridge in 2 minutes then find the speed of the train?
(a) 30 kmph
(b) 45 kmph
(c) 50 kmph
(d) 60 kmph
(e) 54 kmph

Q15. Difference of the interest received when a sum is invested at 15% p.a. at SI for two years and the interest received when that sum is invested at 20% p.a. for one year compounded half yearly is Rs 432, find the sum?
(a) Rs. 5400
(b) Rs. 5000
(c) Rs. 4500
(d) Rs. 4000
(e) Rs. 4800

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