DIGITAL SUM MCQ SET 3
1. During the first year , the population of a town increased by 12% . The next year , due to some contagious disease , it decreased by 8% . At the end of the second year , the population was 64,400 . Find the population of the town at beginning of the first year .
(a) 50,000
(b) 54,750
(c) 62,500
(d) 50,500
Answer: C
2. A manufactured item of cost Rs.12,500 , sold at 10% profit . The supplier the sold at a 5.5% profit to the shopkeeper . The shopkeeper marks it at Rs.2,393.75 higher than his cost price and allowed a 10% discount to the customer . Find the profit earned by the shopkeeper .
(a) 653.75
(b) 693.75
(c) 703.75
(d) 600.75
Answer: C
3. The average score in an english exam of a class of 45 students in a coaching centre is 52 . A group of 6 boys having an average score of 40 leave the class and another group of eight boys having an average score of 43 join the class . What is the new average score of the class?
(a) 48
(b) 53
(c) 49.5
(d) 52
Answer: D
4. The value ofย
(1018) – 1019 x 1017 + 1015 x 1012 – 1016 x 1011
(a) 1
(b) 4
(c) 3
(d) 5
Answer: D
5. X and Y earn an average income of Rs.72000 per month , out of which they saved an average amount of Rs.38800 per month , such that X saved Rs.5,600 less than Y . If the expenditure of X is 55% of his income , then find the percentage expenditure of Y .
(a) 20%
(b) 25%
(c) 30%
(d) 35%
Answer: D
6. The compound interest on a certain sum of money in one year is Rs.64860 and on second year is Rs.7840 . Find compound interest in fourth year :
(a) Rs.10240
(b) Rs.11340
(c) Rs.10780
(d) Rs.9850
Answer: B
7. If the average marks of 1/5 of a class is 77% and that of 1/4 of the class is 85% and the average marks of the rest of the class is 52% . Find the average marks of the whole class?
(a) 57.75%
(b) 65.25%
(c) 68.55%
(d) 43.50%
ย Answer: B
8. The difference between C.I. and S.I. on a certain sum of money at 16% per annum compounded annually in 3 years is Rs.3792 . Then find the principal .
(a) Rs.31250
(b) Rs.62500
(c) Rs.39062.50
(d) Rs.46875
Answer: D
9. Which one of the following is a perfect square?
(a) 6250.49
(b) 1250.49
(c) 5768.28
(d) 1354.24
Answer: A
10. Which one of the following is a perfect square?
(a) 2361.96
(b) 2758.28
(c) 7256.84
(d) 6250.49
Answer: A
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