For the following questions answer them individually
The average marks scored by $$F_{1}$$ and $$F_{2}$$ is 40 more than the average marks scored by $$F_{2}$$ and $$F_{3}$$. If the marks scored by $$F_{3}$$ is 90, then what is the marks obtained by $$F_{1}$$?
If P = 12 $$\div$$ 6 - 2, Q = 8 $$\div$$ 2 - 3, and R = 18 $$\div$$ 9 + 5, then what is the value of P + R $$\times$$ Q?
A sum of money, when invested at the rate of 15% per annum at simple interest, amounts to ₹26,000 in 2 years. What is the simple interest that accrued during these 2 years?
The average of a set of ten numbers is 40. If a number is removed from the set, then the average of the remaining numbers becomes 38. What was the number that was removed?
The cost price of a chair is three times of the profit earned on selling the chair. What is the approximate profit percentage gained through the sale?
Prakhar scored 82% marks in an examination. If he scored 656 marks, then what are the total marks of the examination?
Riya and George start walking towards each other from their houses at the speeds of 6 km/h and 8 km/h, respectively. After how long will they meet if the distance between their houses is 28 km.
A person invests ₹55,000 for two years on compound interest such that the rate of interest for the first year is 8% per annum and that for the second year is 12% per annum, and the interest is compounded annually. What is the total interest earned by the person?