Try to quickly ESTIMATE the answers to the questions below, based on your own logical approach. The goal is not to find out (or Google) the right answer, but to, first, identify a logical approach that can help “guesstimate” an appropriate range–say + or – 30% of the actual answer– and then complete the calculations (ideally mentally, but you can also take notes) to provide a good-enough estimate.
Ready. Set. Go!
Questions:
1) How many times heavier than a mouse is an elephant?.
2) How many firefighters are there in San Francisco?.
3) How many trees are there in NYC’s Central Park?.
The Answer appear below. Again, the key here is to try, plan the steps towards the solution, and do the mental calculations to find a reasonable range. That’s the brain challenge. The goal is not to find the precise correct answer.
Answers:
1) Around 150,000. An average elephant weighs 4,000 kg; an average mouse 25 grams.
2) Around 350 firefighters on duty on any given day, out of a pool of 1700 firefighting overall staff.
3) There are over 26,000 trees (of approximately 175 species) in the Park.
Next brain teaser in SharpBrains’ top 25 series:
maybe
1) 10,000 times (1 ton versus 100 grams)
2) 800 firefighters (80 stations x 10 in each)
3) 5,000 trees
1. 8000
2. 650
3. 1500
Again, the key here is to try, plan the steps towards the solution, and do the mental calculations.That’s the brain exercise.
Answers:
1. Around 150,000. Elephant: 4,000 kg on average; mouse is 25 grams.
2. Around 350 firefighters on duty on any given day, out of a pool of 1700 firefighting and emergency medical field personnel
3. “There are over 26,000 trees of approximately 175 species in the Park.” More information at http://www.centralparknyc.org/17613/4604933
I said 80000 times as heavier (elephant 2000kg, mouse 25g).
Im australian so i have no idea about those american-based questions.
1. 14,000 times heavier
2. 1,300
3. 3,624
1 million
30.000
200.000
my no-calc guesstimations were:
10,000
5,000
8,000