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Interview Question

Assistant Trader Interview(Student Candidate)

89 ^ 2?

Answer

Interview Answer

2 Answers

0

8100-179=7921

Kevin on May 19, 2012
0

Alternatively:

90*88 + 1 = 7200 + 720 + 1 = 7921.

Alternatively again:

200*39 + 121 = 7800 + 121 = 7921.

See Ars Calcula for the mental math trick:

http://arscalcula.com/

Photius on Jun 5, 2012

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