Problem 1174. Wheat on a chessboard pt 2

Created by Robert Turner

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<div style = "text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; "><div style="block-size: 93px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 46.5px; transform-origin: 407px 46.5px; vertical-align: baseline; "><div style="block-size: 63px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 31.5px; text-align: left; transform-origin: 384px 31.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 384px 8px; transform-origin: 384px 8px; unicode-bidi: normal; "><span style="">If a chessboard were to have wheat placed upon each square such that x grains were placed on the first square and each successive square after had y times the amount of grains as the square before. How many grains of wheat would be on the chessboard at the finish?</span></span></div><div style="block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 136px 8px; transform-origin: 136px 8px; unicode-bidi: normal; "><span style="">Assume the chess board is n by n squares.</span></span></div></div></div>

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Last Solution submitted on Mar 15, 2023

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David on 7 Jan 2013

consider using isequalwithequalnans (isequaln) against NaN instead of isequal against 'NaN' in test 7.

Jean-Marie Sainthillier on 12 Mar 2013

n=-1 ???

Asif Newaz on 12 Jan 2020

how to place negative amount of 'wheat' on a chessboard?
the prob is gd but the test suites are unnecessarily jumbled up.

Dyuman Joshi on 10 Apr 2021

Removed the cases with negative quantities. Everyone should be able to solve the problem now.

ChrisR on 5 May 2021

Is test 4 incorrect?

Dyuman Joshi on 5 May 2021

@ChrisR, Yes it was incorrect, and has been corrected.

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Problem 1174. Wheat on a chessboard pt 2

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Problem 1174. Wheat on a chessboard pt 2

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