DIGITAL SUM MCQ SET 1
1. Due to pandemic , the population of city reduces at the rate of 2% per annum . What will be its total population after 2 years if the present population of the city is 45,000?
(a) 40538
(b) 44521
(c) 41568
(d) 43218
Answer: D
2. 2000 employees are assigned to complete a project . At the end of the first year , 15% of the number of employees are decreased and at the end of the second year 10% of the number of employees are decreased . However , to complete the project in the time , end of the third year . What was the number of employees working during the fourth year?
(a) 1786
(b) 1685
(c) 1683
(d) 1783
Answer: C
3. Swati sold a bag to Ankita at a gain of 15% . Aashi bought this bag from Ankita for Rs.24,840 . Ankita earned a profit of 20% . At what price would swati have bought the bag?
(a) Rs.18,500
(b) Rs.18,000
(c) Rs.16,000
(d) Rs.20,000
Answer: B
4. The area of a field in the shape of a hexagon is 1944 โ3mยฒ . What will be the cost (in Rs.) of fencing it at the rate of Rs.11.50 per metre?
(a) 2,256
(b) 3,200
(c) 2,785
(d) 2,484
Answer: D
5. A hemispherical bowl whose radius is 21 cm is full of ice cream . Find the volume of the ice cream . (take ฮ = 22/7)
(a) 20000 cmยณ
(b) 21000 cmยณ
(c) 22000 cmยณ
(d) 19404 cmยณ
Answer: D
6. The total surface area of a solid hemisphere is 1039.5 cm . The volume (in cm) of the hemisphere is : (take ฮ = 22/7)
(a) 2225.5 cmยณ
(b) 2530.6 cmยณ
(c) 2425.5 cmยณ
(d) 2525.6 cmยณ
Answer: C
7. Water is flowing through a cylindrical with an internal diameter of 7 m at the speed of 18 km/h . Find the volume of water flowing through the canal in 30 minutes . (take ฮ = 22/7)
(a) 3,76,500 mยณ
(b) 3,56,500 mยณ
(c) 3,66,500 mยณ
(d) 3,46,500 mยณ
ย Answer: D
8. If the amount obtained by A by investing Rs.9,100 for three years at a rate of 10% p.a. on simple interest is equal to the amount obtained by B by investing a certain sum of money for five years at a rate of 8% p.a. on simple interest , then 90% of the sum invested by B (in Rs.) is :
(a) 7,800
(b) 7,605
(c) 8,540
(d) 8,450
Answer: B
9. A sum of Rs.18,000 becomes Rs.21,780 after 2 years on compound interest compounded annually . What will be the compound interest (in Rs.) on the same sum for the same period if the rate of interest increases by 5%?
(a) 1,845
(b) 4,670
(c) 5,805
(d) 5,500
Answer: C
10. Find the sum 3 + 3^2 + 3^3 + …. + 3^8 .
(a) 6561
(b) 6560
(c) 9840
(d) 3280
Answer: C
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