Inventors and Discovers

1.       Who  made the first balloon that could fly  in  the air  Jacques

2.       Who  invented the first bicycle Baron Daris in 1816

3.       Who  discovered  the metals sodium  and potassium Sir Humphry  Davy

4.       Who   invented the compound microscope Hans and Zacharias  Janssen of Netherlands

5.       Who  discovered the laws of gravitation  Sir  Issac Newton

6.       Who  compiled the first logarithmic  table John Napier  in 1614

7.        Which Danish physicist and chemist founded electromagnetism in 1820 and was also the first isolate aluminum Hans  Christian Oersted

8.       Which planet was  discovered by Sir Willam Herschel in 1781 Uranus

9.       Name the gas discovered in  air by Rayleigh and Ramsay Argon

10.   Who  first made  the incandescent lamp Thomas Alva Edision

11.   Who  discovered Bahama , Cuba and west indies Christopher Columbus

12.    Who  first  isolated sodium Sir Humpy  Davy

13.   Which  mountain range did Henry stanely discover The  Mountains of the Moon

14.   Who  invented the jet engine Frank whittle

15.   Name inventor of the snooker Naveil Bowles Chamberlain

16.   Who first isolated the metallic element radium Pierre and marie curie

17.   Who  invented the gasoline driven internal combustion engine Gottlieb Daimler

18.   Who  discovered hydrogen gas Henry  Cavendish

19.   Who made the first Electric motor Michael Faraday

20.   Who  developed the first printing press in 1439 John Guttenbergh

21.   What system of writing was invented by  Sir Issac Pitman Phonographic Shorthand

22.   Who invented paper in  China Tsai Sun

23.   Who  is credited  with  being the  inventor of  the computer Charles Babbage

24.   Who  first discovered  how  to  measure density Archimedes

25.   Who  invented the electric battery Albert Einstein

26.   Who  invented motion  picture projector Thomas Alva Edision

27    Who  discovered that water was produced by  burning hydrogen Henry Cavendish

28     Who  invented  television John  Baird

29     Who    invented diesel  engine Rudolf Diesel

30     Who invented the battery Alessandro  Volta

31     Who  invented military  tank Ernest Swinton of Britian  in 1916

32     Who  invented  X-ray  tube Withelem Rontgen

33     Who  invented the magic cube Erno Rubic

34    Who propounded  the Theory  of Relativity  Albert Einstein

35    Who  invented the first simple calculating machine Blaise Pascal

36     Who  invented shorthand Sir Issac  pitman

37    Who invented   the  safety -razor King C Gillette

38     Who   discovered  the  solar system Copernicus

39    Who built the first submarine and when                                                   David Bushnell in 1776

40    Who  invented  the lightning conductor Benjamin Franklin

prepared by S Jayhachandran, System Administrator , Mavelikara Postal Division , 690101-996164279

Mathematical Symbols - Roman Numerals

Number	Roman numeral
1	I
2	II
3	III
4	IV
5	V
6	VI
7	VII
8	VIII
9	IX
10	X
11	XI
12	XII
13	XIII
14	XIV
15	XV
16	XVI
17	XVII
18	XVIII
19	XIX
20	XX
30	XXX
40	XL
50	L
60	LX
70	LXX
80	LXXX
90	XC
100	C
200	CC
300	CCC
400	CD
500	D
600	DC
700	DCC
800	DCCC
900	CM
1000	M
5000	V
10000	X
50000	L
100000	C
500000	D
1000000	M