Directions (1-5): What should come in place of question mark (?) in the following questions?
Q1. √4225÷ ∛2197 × 45% of 760 = ?
Q5. 36% of 245 - 40% of 10 = 10 - ?
Or, ? = -74.2
Q6. Murli, Arjit and Kamal can do a work in 8, 16 and 24 days respectively. They all begin together. Murli continues to work till it is finished, Kamal leaving off 2 days and Arjit one day before its completion. In what time is the work finished?
Q7. Harshit and Prabhat started a race from opposite ends of the pool. After one and a half minute, they passed each other at mid of total distance between poles. If they lost no time in turning and maintained their respective speeds, how many minutes after starting did they pass each other the second time?
Q8. In an examination, the average of marks was found to be 50. For deducting marks for computational errors, the marks of 100 candidates had to be changed from 90 to 60 each and so the average of marks came down to 45. The total number of candidates, who appeared at the examination, was
Q9. A bag contains an equal number of 50-paise, 25-paise, 20 paise and 5-paise coins respectively. If the total value is Rs 40, how many coins of each type are there?
Or, x = 40
Q10. Ratio of cost price to selling price of an article is 5 : 6. If 20% discount is offered on marked price of article then marked price is what percent more than cost price?
Directions (11-15): In the following questions two equations numbered I and II are given. You have to solve both the equations
Q11. I. x²-x-12=0
Q12. I. x²-8x+15=0
Q13. I. x²-32=112
Q14. I. x-√121=0
Q15. I. x²-16=0