Expected Maths, General knowledge, Current affairs question for tnpsc group II exam-Part 3

1)Two men undertake a job for Rs.960.They can complete it in 16 days and 24 days, respectively. They work along with a third man and take 8 days to complete it.Then the share of the third man should be?
Answer=Rs.160
(Explanation:Work done by A=8/16=1/2
Work done by B=8/24=1/3
Work done by C=1-((1/2)+(1/3))=1-(5/6)=1/6
C's share=(1/6)*960=Rs.160
(A,B,C are three men working together)
2)Where is  World Economic Forum
Meeting Recently  Held?
Answer=Davos,switcherland


3)The Population of a village decreases at the rate of 20% per annum.If it's population 2 years ago was 10,000,the present population is?
Answer=6400
(Explanation:Present Population,
10,000(1-(20/100)^2)
10,000*(4/5)*(4/5)
6400)
4)An express train leaves a station A at 6.45 p.m and reaches a station B 150km away at 10.30 p.m.Time taken by the train to reach the next station C at a distance of 160 km away from station B with the same speed is?
Answer=4 hours
(Explanation:speed of the train(km/hour)
150/(3(3/4)=150*4/15=40 km/hour
Time taken in reaching the station C
160/40=4hours)
5)If each side of a square is increased by 10%, then the increase in the area is?
Answer=21%
(Explanation:a+b+(ab)/100
10+10+(10*10)/100=21%)
6)A tradesman sold an article at a loss of 20%.If he sold the article at Rs.200 more,then he would have gained 5%.The cost price of the article is?
Answer=Rs.800
(Explanation:((80/100)-(105/100))*x=200
x=Rs.800
7)Who was the first woman ruler of Delhi?
Answer=Razia Begum
8)Name the commander of the Arab Army who conquered Sindh?
Answer=Muhammed bin Qasim
9)The School of arts developed during the Kushan Period with the mixture of Indian and Greek style is known as?
Answer=Gandhara Art
10)Which city has the "city of seven Islands"?
Answer=Mumbai
11)Where is located kakrapara river project?
Answer=Gujarat
(it is located across the river of Tapti river)
12)Which satellite is recently,launched by ISRO?
Answer=IRNSS-1E
(Indian navigation system recently launched India's fifth navigation Indian regional navigational satellite system(IRNSS-1E),It was launched on board of PSLV-C-31 rocket from satish dhawan space centre(SHAR),sriharikota from Andra Pradesh)
13)What is the India's economic growth forecast for current fiscal as per International Monetary Fund (IMF)?
Answer=7.3%
14)India's loan agreement with world Bank for which development project?
Answer=Bihar-Kosi Basin project
15)Which committee has been setup on yoga education in universities?
Answer=H.R.Nagendra committee
16)Who have been appointed as New chairman of CBDT?
Answer=Atulesh Jindal
(central board direct taxes)