How many terms of the AP 17, 15, 13, 11, ... must be added to get thesum 72? Explain the double answer.

How many terms of the A.P. 17 ,15, 13 , 11,... must be added to get the sum 72?

How many terms of the AP 3, 5, 7, 9, … must be added to get the sum 120?

How many terms of the AP 21, 18, 15,… must be added to get the sum 0?

How many terms of the series {27+24+21+…} must be added to get the sum 132 ? Explain the double answer.

How many terms of the AP 18,16,14,12 ,….. Are needed to given the sum 78 ? Explain the double answer.

How many terms of the series {22+18+14+10+…} must be added to get the sum 64? Explain the double answer.

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 term of the A.P. 15 , 12, 9 ., - are needed to give the sum 15 ? Explain the duble answer .

How many term of the A.P. 15 , 12, 9 ., - are needed to give the sum 15 ? Explain the duble answer .

How many terms of the AP -15, -13, -11, … are needed to make the sum -55 ?