Expected Maths, General knowledge, Current affairs question for tnpsc group II exam-Part 2

1)Alex sold his goods after announcing two successive discounts of 30% each.The effective discount altogether is?
Answer=51% decrease
(Explanation:Two time decrease,
-30-30+(30*30)/100=-60+9=-51%)
2)A and B can do a piece of work in 36days,B and C can do it in 60days,A and C do it in 45days.C alone can do it in?
Answer=180 days
(Explanation:A+B one day work=1/36
B+C one day work=1/60
C+A one day work=1/45
2(A+B+C) one day work=(1/36)+(1/60)+(1/45)
A+B+C=(1/2)*((1/36)+(1/60)+(1/45))
A+B+C=1/30
C's one day work=(1/30)-(1/36)=1/180
C can finish the job in 180 days)


3)Kishan spends 30% of his salary on food and donates 3% in a charitable trust.He spends Rs.2,310 on these two items,then total salary for that month is?
Answer=Rs.7000
(Explanation:33% of total salary=Rs.2310
Total salary=2310*100/33=Rs.7000)
4)A and B are two alloys of gold and copper in the ratio 7:2 and 7:11,respectively.If equal quantities of these two alloys are melted to form a new alloy C,then the ratio of gold and copper in C is?
Answer=7:5
(Explanation: Let one kg of each alloy be mixed,
Alloy   Gold   Copper
A       7/9    2/9
B       7/18   11/18
C       (7/9)+ (2/9)+
       (7/18) (11/18)
       (21/18)(15/18)
Required ratio=21:15
          Ans=7:5)
5)A sells a cycle to B at a profit of 10%,B sells to C at a profit of 20%.If C pays Rs.264 for it,how much
did A pay for it?
Answer =Rs.200
(Explanation:Cost price for B=(100/120)*264=Rs.220
Cost price for A=(100/110)*220=Rs.200)
6)Dronacharya Awards are given to?
Answer=Outstanding coaches in the sport field
7)Who said that"Parlimentary democracy means one individual and one vote"?
Answer=Dr.B.R.Ambedkar
8)Where is located "Dudhwa" National park?
Answer=Uttar pradesh
9)What is the name of Boundary between North and south Korea?
Answer=38th parallel
10)Which book was authored by Krishna Deva Raya?
Answer=Amukta Malyad
11)What is the position of India in global talent competitiveness index on 2015-2016?
Answer=89
(First position is Switzerland)
12)Which state government has announced 35% job reservation for reserved and unreserved category?
Answer=Bihar
13)The theater festival 'Nandi Natakotsavam' is celebrated in which state?
Answer=Andra pradesh
14)The largest single-site solar power project in the world will come up in which Indian state?
Answer=Madhya pradesh
15)"Law on which the supreme court functions" is form of which country sources of Indian constitution?
Answer=Japan