The sum of this series can be calculated by grouping the numbers in pairs and then subtracting the second number from the first number in each pair.
(99-97) + (95-93) + (91-89) + ... + (11-9) + (7-5) + (3-1)= 2 + 2 + 2 + ... + 2 + 2 + 2= 2 (49 pairs)= 2 49= 98
Therefore, the sum of the series is 98.
The sum of this series can be calculated by grouping the numbers in pairs and then subtracting the second number from the first number in each pair.
(99-97) + (95-93) + (91-89) + ... + (11-9) + (7-5) + (3-1)
= 2 + 2 + 2 + ... + 2 + 2 + 2
= 2 (49 pairs)
= 2 49
= 98
Therefore, the sum of the series is 98.