arithmatic progression

Is the sequence arithmetic: 0.2, 0.22, 0.222, 0.2222, ....

• yes

• no

What is the common difference of an AP in which a₁₈ – a₁₄ = 32?

• 4

• 6

• 8

• -8

The 4th term from the end of the AP: –11, –8, –5, ..., 49 is

• 40

• -2

• 58

• -40

2019^th term of an AP is written as

• a + 2018d

• a + (2019 + 1) d

• a- 2018d

• 2a + 2018 d

The angles of a triangle are in A.P., the least being half the greatest. Find the angles.

• -30,-60,-90

• -40,-60,-80

• 40, 60, 80

• 45,45,90

If the nth term of an AP is (2n+1) then the sum of its first three terms is

• 6n+21

• 15

• 12

• 21

. How many terms of the A.P. 65, 60, 55, … be taken so that their sum is zero?

• 25

• 27

• 29

• 31

Determine the AP whose fifth term is 19 and the difference of the eighth term from the thirteenth term is 20.

• 4,8,12,16

• 3,7,11,15

• -3,-7,-11,-15

• -4,-8,-12,-16

two APs have the same common difference. The first term of one of these is -1 and that of the other is – 8. Then the difference between their 4th terms is

• 1

• -8

• 7

• 9

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