Fastest Time To Mentally Calculate 40 Random Division Items

United States Krupali Bhagyesh Patel


Gandhinagar, Gujarat, India / May 6, 2013

Krupali Bhagyesh Patel mentally solved 40 random division items correctly in 45.50 seconds. She is a champion at an international math competition held in Australia.

- must divide randomly selected four-digit by two-digit numbers
- all items must be correctly solved
- must be solved mentally; may not use calculator or other device
- no assistance permitted during the attempt


Tags: wildcardfastestkidsmathnumbersacademicdigitsdivision

  • Canada Dan Rollman

    Dan Rollman

    Krupali - can you explain your mental process? It seemed you were able to compute the numbers without even looking at them.

    I'd also love to understand how the division items were "randomly" created. Was a computer algorithim involved? If someone wants to try and beat you, how should they create their items?

  • United States Ella Morton

    Ella Morton

    Wow. So cool under pressure! Amazing work.

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