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In 1900, at the age of 21, Albert Einstein was a university graduate and unemployed. To manage his expenses, he worked as a teaching assistant and gave private lessons. He finally secured a job in 1902 as a technical expert in the patent office in Bern. While he was supposed to be assessing other people’s inventions, Einstein was actually developing his own ideas in secret. He is said to have jokingly called his desk drawer at work the “bureau of theoretical physics.” One of the famous papers of 1905 was Einstein’s Special Theory of Relativity, according to which time and distance are not absolute.
Two students appeared at an examination. One of them secured 18 marks more than the other and his marks were 62% of the sum of their marks. Find the mar...
M and N are two numbers. Their average is 160, and the sum of M and N is 120% of M. What percentage of M is the difference between M and N?
The monthly income of Raju was Rs. 13500 and his monthly expenditure was Rs. 9000. Next year his income increased by 17% and his expenditure increased b...
If two successive discounts of 20% and 12% are applied, what would be the equivalent single discount?
A gets 34% of the full marks in an exam and fails by 80 marks. B gets 36% of the full marks in the same exam and he also fails by 64 marks. What is the ...
Income of Ravi is Rs. 52,800, out of which he spent 35% on daily expenses, 5% on phone bills and saves the rest. If his income is increased by 15% and h...
A person sells each package of snacks for Rs. 13 each. On Monday, he sold 100 packages which was 32 more than that on Tuesday but 21 less than that on W...
The population of a town increases by 5% every year. If the population of the town at the beginning of 2020 was 50,000, what will the population be at t...
Sahil spends 30% of his monthly income on food articles, 40% of the remaining on conveyance and clothes and saves 50% of the remaining. If his monthly s...