Author: Study Clue

An AP has sum of first 10 terms 210 and sum of first 20 terms 820; the first term is

In an AP, the 2nd term is 9 and the 8th term is 33; the common difference is A 3

An AP has first term 7 and sum of first 5 terms is 45; the common difference is A 2

An AP has a₁=12 and a₅=28; the common difference is A 3 B 5 C 6 D 4 Explanation In

In an AP, which value stays constant between consecutive terms? A Common ratio B Product constant C Common difference D

In permutations of numbers 1 to 7, the order must satisfy 1 before 2 before 3 A 720 B 1260

A school chooses President, Vice-President, and two different captains from 10 students, all roles distinct A B. 210 B C.

In how many ways can 3 positions be filled from 9 distinct students, without repetition A 720 B 84 C

For nPr, r must satisfy A r > n B r ≤ n C r < 0 D r =

Which symbol denotes factorial? A n! B n^2 C n+1 D n/2 Explanation Factorial of n is written as n!