If the sum of the 100 terms of an A.P. is `-1` and the sum of the even numbered terms lying in first 100 terms is 1, then

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1, then which of the following is not true?

If the sum of the first 100 terms of an AP is -1 and the sum of even terms lying in first 100 terms is 1 , then which of the following is not true ?

If the sum of first 100 terms of an arithmetic progression is -1 and the sum of the even terms lying in first 100 terms is 1, then which of the following statement(s) is (are) correct?

The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms.