Important Inventions and Discoveries in World » Exercise – 1
6. This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.
(a) George Washington
(b) Alexander Hamilton
(c) John Adams
(d) Thomas Jefferson
| Subject Name : General Knowledge |
| Exam Name : UPSC, SSC, KVS, NVS, IBPS, RBI, SBI, RRB |
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