Q. 1. The 6th term of an Arithmetic Progression (AP) is – 10 and the 10th term is – 26. Determine the 15th term of the AP. (- 46)
Q. 2. If the 8th term of an AP is 31 and 15th term is 16 more than the 11th term, find the AP.
Q. 3. Find the sum of : 25 + 28 + 31 + …………………….+ 100.
Q. 4. Find the sum of all the natural numbers between 200 and 500, which are divisible by 8.
Q. 5. Find the 10th term from end of the AP : 4, 9, 14, ……………… 254.
Q. 6. If fifth term of an AP is zero., show that its 33rd term is four times its 12th term.
Q. 7. If 7 times of 7th term of an AP is equal to 11 times of 11th term, show that the 18th term of the AP is zero.
Q. 8. Find the number of terms of the AP: 64, 60 56,………….. so that their sum is 544.
Q. 9. Which term of the AP: 5, 9, 13,…………. is 81? Also, find the sum of 5 + 9 + 13+…… + 81.
Q. 10. The sum of first n terms of an AP is given by (n2 + 3n). Find the 20th term of the progression.
Q. 11. Find the sum of the first 25 terms of an AP whose nth term is given by tn = 2 – 3n.
