Test 05 || Class 10th Maths || Ch. 05 Arithmetic progression 1. If p,q, r and s are in AP then what is r - q. 2. If 1/a, 1/b and 1/c are in AP so that b = 2ac/(a + c). (Also writes in inverse from) 3. If p,q, r are in AP then what is (p - q)/ (q - r). 4. If SN denotes …