Category: Sequences and Series

18. 150 workers were engaged to finish a job in a certain number of days. 4 workers dropped

17. A manufacturer reckons that the value of a machine, which costs him Rs. 15625, will depreciate each

16. A man deposited Rs 10000 in a bank at the rate of 5% simple interest annually. Find

15. A person writes a letter to four of his friends. He asks each one of them to

14. Shamshad Ali buys a scooter for Rs 22000. He pays Rs 4000 cash and agrees to pay

13. A farmer buys a used tractor for Rs 12000. He pays Rs 6000 cash and agrees to

12. Find the 20th term of the series 2×4 + 4×6 + 6×8 + … + n terms.

11. Find the sum of the following series up to n terms:(i) 5+55+555+ …….… (ii) .6+.66+.666+………….. Sequences and

10. The ratio of the A.M. and G.M. of two positive numbers a and b is m :

9. If a and b are the roots of (x^2–3x+p=0) and c, d are roots of (x^2–12x+q=0), where