Arithmetic Progression

The nth term of an A.P. is given by a_n = 3 + 4n. The common difference is

• 7

• 3

• 4

• 1

If p, q, r and s are in A.P. then r – q is

• s – p

• s – q

• s – r

• none of these

If the sum of three numbers in an A.P. is 9 and their product is 24, then numbers are

• 2, 4, 6

• 1, 5, 3

• 2, 8, 4

• 2, 3, 4

The (n – 1)th term of an A.P. is given by 7,12,17, 22,… is

• 5n + 2

• 5n + 3

• 5n – 5

• 5n – 3

The nth term of an A.P. 5, 2, -1, -4, -7 … is

• 2n + 5

• 2n – 5

• 8 – 3n

• 3n – 8

The 10th term from the end of the A.P. -5, -10, -15,…, -1000 is

• -955

• -945

• -950

• -965

Find the sum of 12 terms of an A.P. whose nth term is given by a_n = 3n + 4

• 262

• 272

• 282

• 292

The sum of all two digit odd numbers is

• 2575

• 2475

• 2524

• 2425

The sum of first n odd natural numbers is

• 2n²

• 2n + 1

• 2n – 1

• n²

nth term of the sequence a, a + d, a + 2d,… is

• a + nd

• a – (n – 1)d

• a + (n – 1)d

• n + nd