Q4. Find the maximum number of trees which can be planted 20 m apart, on two sides of a straight road 1760 m long
Q5. Mohan gets 3 marks for each correct sum and loses 2 marks for each wrong sum. He attempts 30 sums and obtains 40 marks. The number of sums solved correctly is:
Q6. A man wants to invest Rs. 3900 in account of his two sons who are 14 years and 16 years old in such a way that they will get equal amount at the time of attaining the age 18 years. If rate of interest per annum is 10% then find the amount he deposit in account of his younger son?
Q7. A certain sum of money amounts of 5000 in five years at 10% per annum. In how many years will it amount to 6000 at the same rate?
(a) 8 years
(b) 6 years
(c) 10 years
(d) 9 years
Q8. A man had 2000, part of which he lent at 5% and the rest at 4% the whole annual interest was 92. How much did he lent at 5%
Q9. A sum of money becomes five times at the simple interest rate of 8% per annum. At what % will it become seven fold at same time.