What is 1/4 of 1/2 of 1/5 of 400?
Great, you answered "2.5".
See here what other people have answered:
- 80
- 60
- 2.5
- 10
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Interesting fact:
Over 24-years-old? I’m afraid you’re over the hill! Our brains start to slow down once we reach this age although different skills may peak at different ages. This is why most of a talented mathematician’s innovative work will happen at the beginning of their career.