How many terms of the AP : 24, 21,18,... must be taken so that their sum is 78?

How many tems of the AP: 24, 21, 18,… must be taken so that their sum is 78?

How many terms of the A.P.: 24, 21, 28, … must be taken so that their sum is 78?

How many terms of the A.P. : 24, 21, 18, ……… must be taken so that their sum is 78?

How many terms of the A.P. : 24, 21, 18,…………... must be taken so that their sum is 78 ?

How many terms of the AP : 24 , 21, 18 ....... Must be taken so that sum is 78 ?

How many terms of the A.P : 9,6,3,"….." must be taken so that their sum is 78 ?

How many terms of the AP 1,2,3,... must be taken so that their sum is 55

How many terms of the AP 27, 24, 21, ... should be taken so that their sum is zero ?

How many terms of the A.P. 24,20, 16, ... must be taken so that the sum may be 72? Explain the double answer.

How many terms of the A.P. 63, 60, 57, .... must be taken so that their sum is 693?