4 ms·
Don't try to count or guess, use simple math shortcuts. I took a rough average of the double digit numbers on the screen (35), multiplied by the number of doub
by tyng 16y ago
Don't try to count or guess, use simple math shortcuts.
I took a rough average of the double digit numbers on the screen (35), multiplied by the number of double digit numbers (16), and since 30 x 10 is 300, I guessed the total would be around 500.
This was all done within 5 seconds
- steve19 16y agoI simply noticed that the bottom two rows had numbers clustered around 30. So I did 30 * 20 = 600. Not as close as your guess, but close enough :)
- StavrosK 16y agoYeah, same here. I noticed a few spots were blank, so I'd say around 540, but yeah, close enough.
- ph0rque 16y agoSame here... I counted 14 boxes with numbers around 30, so that was 420. I rounded up to 500 because I knew there were skipped boxes. All under 5 seconds.
- hyyypr 16y agoI think you are missing the point. No simple math tricks can overcome the fact that I am impressed at the amount on my credit card bill at the end of the month. What the author tried to convey is more the incapacity of the brain to apprehend a large amount of small numbers.
- eru 16y agoSimple math will tell you to estimate your credit card bill using old credit card bills as a reference, not your gut feeling about how much you spend.