Thanks for the explanation.
Actually, after thinking again, here is my explanation:
If there are even number of negative consecutive numbers. In this case, product of the consecutive numbers will be positive, but the sum will be negative, hence the quotient will be negative. Hence their sum will be equal to their absolute sum. --Y
If there are odd number of negative consecutive numbers. In this case, product of the consecutive numbers will be negative, so is the sum. Hence stmt 1 is not met.
However, if there are some +ve and some -ve numbers, product will be 0 (consecutive integers). In this case, quotient cannot be negative. Stmt 1 is not met.
Hence there is only one possibility, there are even number of the negative consecutive numbers.
Hence stmt 1 is sufficient coz to get a negative quotient, there must be even number of negative consecutive numbers.
Is the above logic correct?