Question
Who wrote the book "The Origin of
Species"?Solution
Charles Darwin wrote "The Origin of Species" in 1859, explaining the theory of evolution by natural selection.
- A number is first increased by 20% and then decreased by 20%. The overall change in number is:
- Due to a 50% rise in fuel prices, Arjun decides to reduce his usage by 40%. Find the net percentage change in his fuel expenses.
20% of 35% of a number is 175. What is 18% of that number?
In a certain school, 60% of the students are girls, and the rest are boys. If the number of boys in the school is 480, how many students are there in to...
A invested a certain amount in Debt and Equity mutual funds in the ratio of 5: 7 respectively. At the end of one year, he earned a total dividend of 30%...
'U' spends 25% of his monthly income on food, 30% on rent, and 15% of the remaining amount on insurance. He saves the rest in a savings plan that gives ...
Seven years ago, the ratio of the ages of A and B was 4: 5. Eight years hence, the ratio of the ages of A and B will be 9:10. What is the sum of their p...
The ratio of the monthly earning of A to that of B is 5:7.If monthly earning of A increased by 25% and that of B decreased by 60% the new ration between...
Monthly income of P is Rs.14000 and his monthly savings is Rs.8500. If his monthly income is decreased by 30% and monthly expenditure is decreased by 25...
The marked price of an article is 30% higher than the cost price. If a trader sells the articles allowing 10% discount to customer, then the gain percen...
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