Multiple choice softskills creativity

Take 1000. Add 40. Add another 1000. Add 30. 1000 again. Plus 20. Plus 1000. And plus 10. Quickly, what is the total?

  1. 4100

  2. 5100

  3. 5500

  4. 5000
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Adding sequentially: 1000+40=1040, +1000=2040, +30=2070, +1000=3070, +20=3090, +1000=4090, +10=4100. The pattern is 4000 + (40+30+20+10) = 4100. This tests attention to detail in mental arithmetic.

AI explanation

Adding step by step: 1000+40=1040, +1000=2040, +30=2070, +1000=3070, +20=3090, +1000=4090, +10=4100. The trick is that saying the numbers quickly makes people mentally round each addition up to the next thousand (e.g., hearing '1000' repeatedly and losing track), which is how many people incorrectly land on 5000. Careful running totals give 4100.

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