Problem 252. Project Euler: Problem 16, Sums of Digits of Powers of Two

Created by @bmtran (Bryant Tran)

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>What is the sum of the digits of the number 2^N?</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Thanks to</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://projecteuler.net/problem=16\"><w:r><w:t>Project Euler Problem 16</w:t></w:r></w:hyperlink><w:r><w:t>.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

507 Solutions
98 Solvers

Last Solution submitted on Oct 26, 2021

Last 200 Solutions

Problem Comments

1 Comment

1 Comment

@bmtran (Bryant Tran) on 4 Feb 2012

added a test case to make it a wee bit harder

Solution Comments

Solution 216618

2 Comments

2 Comments

Harish Maradana on 13 Mar 2013

function y = pow2_sumofdigits(x)
number = sym(2^x);
n = char(number);
y = 0;
for i = 1:length(n)
y = y + str2double(n(i));
end
end
this code gives exact results on my mechine but not work in cody show error
Error: License checkout failed.
License Manager Error -5
Cannot find a license for Symbolic_Toolbox.
Troubleshoot this issue by visiting:
http://www.mathworks.com/support/lme/R2013a/5
Diagnostic Information:
Feature: Symbolic_Toolbox
License path: 13501@10.206.97.41:13501@10.10.207.33:/tmp/matlabpref/.matlab/R2013a_licenses:/opt/mlsedu/matlab/R2013a/licenses/license.dat:/opt/mlsedu/matlab/R2013a/licenses
Licensing error: -5,0.

please help me ...........

Jiawei Gong on 12 Apr 2020

Symbolic_Toolbox can't run on Cody.

Problem Recent Solvers98

Problem Tags

big integer digits project euler

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 252. Project Euler: Problem 16, Sums of Digits of Powers of Two

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers98

Suggested Problems

More from this Author56

Problem Tags

Community Treasure Hunt

Problem 252. Project Euler: Problem 16, Sums of Digits of Powers of Two

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers98

Suggested Problems

More from this Author56

Problem Tags

Community Treasure Hunt

Players