10ii AP Basics-2

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

• 5

• 20

• 25

• 30

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

• 18,20

• 19,23

• 17,21

• 23,25

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

• 1

• 2

• -1

• -2

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

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

• 5n+2

• 5n+3

• 5n-2

• 5n-3