Multiple choice general knowledge math & puzzles

find the value of the expression 1-6+2-7+3-8... 100 terms

  1. -500

  2. -250

  3. -600

  4. -200

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series consists of 100 terms which can be grouped into 50 pairs: (1-6), (2-7), (3-8), and so on. Each pair simplifies to -5. Multiplying the value of one pair (-5) by the total number of pairs (50) results in -250. Other options are incorrect because they miscalculate the number of pairs or the value per pair.