{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-26T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":441,"title":"Drying sweater?","description":"* A sweater is revolving in a slow low power dryer and losing moisture at any moment at the constant rate 100% of its current moisture content in 100 minutes. \r\n* Veronica knew the sweater was x times its dry weight when she put her wet sweater from the washer to the dryer. \r\n* How many minutes she should wait so that the sweater weighs w times its dry weight? \r\n* Please try a general solution, the test suite may expand later.","description_html":"\u003cul\u003e\u003cli\u003eA sweater is revolving in a slow low power dryer and losing moisture at any moment at the constant rate 100% of its current moisture content in 100 minutes.\u003c/li\u003e\u003cli\u003eVeronica knew the sweater was x times its dry weight when she put her wet sweater from the washer to the dryer.\u003c/li\u003e\u003cli\u003eHow many minutes she should wait so that the sweater weighs w times its dry weight?\u003c/li\u003e\u003cli\u003ePlease try a general solution, the test suite may expand later.\u003c/li\u003e\u003c/ul\u003e","function_template":"function m = drying(x,w)\r\n   m=x/w;\r\nend","test_suite":"%%\r\nx=2; w=1.5; m=drying(x,w);\r\nm_correct = 69;\r\nassert(round(m)==m_correct)\r\n%%\r\nx=3; w=2; m=drying(x,w);\r\nm_correct = 69;\r\nassert(round(m)==m_correct)\r\n%%\r\nx=5; w=2; m=drying(x,w);\r\nm_correct = 139;\r\nassert(round(m)==m_correct)\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":6,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":34,"test_suite_updated_at":"2012-03-06T17:52:02.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2012-03-02T17:09:51.000Z","updated_at":"2026-04-21T13:42:12.000Z","published_at":"2012-03-13T16:01:43.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"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\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eA sweater is revolving in a slow low power dryer and losing moisture at any moment at the constant rate 100% of its current moisture content in 100 minutes.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eVeronica knew the sweater was x times its dry weight when she put her wet sweater from the washer to the dryer.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eHow many minutes she should wait so that the sweater weighs w times its dry weight?\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ePlease try a general solution, the test suite may expand later.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"problems":[{"id":441,"title":"Drying sweater?","description":"* A sweater is revolving in a slow low power dryer and losing moisture at any moment at the constant rate 100% of its current moisture content in 100 minutes. \r\n* Veronica knew the sweater was x times its dry weight when she put her wet sweater from the washer to the dryer. \r\n* How many minutes she should wait so that the sweater weighs w times its dry weight? 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