NIELIT Scientist D Paper 2019 – Aptitude
The different between simple interest and compound interest on a sum for 2 years at 8%, when the interest is compounded annually is Rs. 16. If the interest were compounded half-yearly, the difference in 2 years would be nearly-
(a) Rs. 16
(b) Rs. 16.80
(c) Rs. 21.85
(d) Rs. 24.64
A man travels 35 km partly at 4 kmph and partly at 5 kmph. If he covers the former distance at 5 kmph and the later distance at 4 kmph, he could cover 2 km more in the same time. The time taken to cover the whole distance at the original rate (in hours) is
(a) 4 & 1/2 hours
(b) 7 hours
(c) 8 hours
(d) 9 hours
A certain number consists of two digits whose sum is 9. If the order of digits is reversed, the new number is 9 less than the original number. The original number is
(a) 45
(b) 36
(c) 54
(d) 63
In an examination, 52% of the candidates failed in English, 42% in Mathematics and 17% in both. The number of those who passed in both the subjects, is
(a) 83%
(b) 23%
(c) 64%
(d) 55.5%
A can do a piece of work in 14 days which B can do in 21 days. They begin together but 3 days before the completion of the work, A leaves off. The total number of days to complete the work is
(a) 33/5
(b) 17/2
(c) 51/5
(d) 27/2
The greatest number of four digits which is divisible by each one of the numbers 12, 18, 21 & 28, is
(a) 9848
(b) 9864
(c) 9828
(d) 9636
If 9 men working 15/2 hours a day can finish a work in 20 days, then how many days will be taken by 12 men working 6 hours a day to finish the work, it being given that 3 men of former type work as much as 2 men of the latter type in the same time?
(a) 25/2
(b) 13
(c) 19/2
(d) 11
Due to a fall in the rate of interest from 13% p.a. to 12.5% p.a., a money lender’s yearly income diminishes by Rs. 104. His capital is
(a) Rs. 21,400
(b) Rs. 20,800
(c) Rs. 22,300
(d) Rs. 24,000
Rs. 49 were divided among 150 children. Each girl got 50 paise and a boy 25 paise. How many boys were there?
(a) 100
(b) 102
(c) 104
(d) 105
A boy 1.4 m tall casts a shadow 1.2 m long at the time when a building casts a shadow 5.4 m long. The height of the building is
(a) 4.63 m
(b) 3.21 m
(c) 6.3 m
(d) 5.6 m
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