Page 1 :
CLASS TEST, AP, EACH QUESTION CARRY 3 MARKS., 1. Find the sum of the following A. P. 1, 3, 5, 7, … , 199, 2. Find the AP whose 10th term is 5 and 18th term is 77., 3. In a certain A. P the 24th term is twice the 10th term. Prove that the 72nd term is twice the 34th, term., 4. a, b and c are in AP. Prove that b+c, c+a and a+b are in AP, 5. determine the AP whose third term is 16 and the difference of 5th and 7th term is 12.