Arithmetic Progression MCQ'S

In an AP, if d = –4, n = 7, a_n = 4, then a is

• 6

• 7

• 20

• 28

• -20

• 20

• -30

• 30

The 21st term of the AP whose first two terms are –3 and 4 is

• 17

• 137

• 143

• -143

If the common difference of an AP is 5, then what is a₁₈ – a₁₃?

• 5

• 20

• 25

• 30

The sum of first five multiples of 3 is

• 45

• 55

• 65

• 75

The middle most term (s) of the AP:–11, –7, –3, ..., 49 is:

• 18,20

• 19,23

• 17,21

• 23,25

If 7 times the 7th term of an AP is equal to 11 times its 11th term, then its 18th term will be

• 7

• 11

• 18

• 0

In an AP if a = 1, a_n = 20 and S_n = 399, then n is

• 19

• 21

• 38

• 42

If the numbers n – 2, 4n – 1 and 5n +2 are in AP, then the value of n is:

• 1

• 2

• -1

• -2

The first four terms of an AP, whose first term is –2 and the common difference is –2, are

• – 2, 0, 2, 4

• – 2, 4, – 8, 16

• – 2, – 4, – 6, – 8

• – 2, – 4, – 8, –16