Mathematics · Simplification
Evaluate the following sum: 1 2 + 1 6 + 1 12 + 1 20 + 1 30 + 1 42 + 1 56 + 1 72 + 1 90 + 1 110 = ?
- 19 10
- 21 1 11
- 310 11✓
- 411 10
Correct answer
10 11
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