// Numbas version: exam_results_page_options
{"name": "Maria's copy of Are given matrices in (reduced) row echelon form?", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Maria's copy of Are given matrices in (reduced) row echelon form?", "variables": {"g24": {"name": "g24", "definition": "if(t=1 or t=3 or t=5,random(-9..9),if(t=6,1,0))", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g14": {"name": "g14", "definition": "if(t=1 or t=3 or t=5,random(-9..9),0)", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "mb2": {"name": "mb2", "definition": "if(c12=1 and w=0,0.6,0)", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g26": {"name": "g26", "definition": "if(t=1,random(-9..9),0)", "templateType": "anything", "group": "Ungrouped variables", 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"[[0,0,0.6],[mb1,mb2,mb3],[0,0,0.6],[0,0.6,0],[mf1,mf2,0]]", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g23": {"name": "g23", "definition": "if(t=2 or t=3, random(-9..9),if(t=4 or t=5,1,0))", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "u1": {"name": "u1", "definition": "random(0,random(-4..4 except 0))", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g22": {"name": "g22", "definition": "if(t<4,1,0)", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g13": {"name": "g13", "definition": "if(t=2 or t=3 or t=6,random(-9..9),0)", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g12": {"name": "g12", "definition": "if(t<4,0,random(-9..9))", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "u2": {"name": "u2", "definition": "random(0,random(1..9))", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "a": {"name": "a", "definition": "\n    matrix([0,random(-9..9),random(1..5),-random(1..5)],\n      [random(1..5),0,b23,random(1..5)],\n      [random(1..5),random(-9..9),0,0])\n      \n    ", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g46": {"name": "g46", "definition": "if(t=1,random(-9..9),1)", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g34": {"name": "g34", "definition": "if(t=3 or t=5 or t=6,0,if(t=1,random(-9..9),1))", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "c": {"name": "c", "definition": "\n    matrix([0,0,1,0,random(-5..5)],\n      [1,0,random(-5..5),0,random(1..9)],\n      [0,1,random(-9..9),0,1+random(-5..5)],\n      [0,0,0,1,-random(1..9)])\n    ", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "g25": {"name": "g25", "definition": "if(t=2 or t=4,random(-9..9),0)", "templateType": 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"description": ""}}, "metadata": {"licence": "Creative Commons Attribution 4.0 International", "description": "<p>Choose which of 5 matrices are in a) row echelon form but not reduced b) reduced row echelon form c) neither.</p>"}, "rulesets": {}, "tags": [], "advice": "<p>Look at your notes for the definition of echelon form.</p>", "variablesTest": {"maxRuns": 100, "condition": ""}, "preamble": {"js": "", "css": ""}, "statement": "\n    <p><strong>Echelon Forms</strong></p>\n  <p>For each of the following matrices choose which are:</p>\n  <p>a) In row echelon form but not in reduced row echelon form.</p>\n  <p>b) In reduced row echelon form.</p>\n  <p>c) Neither a) nor b).</p>\n    ", "ungrouped_variables": ["b23", "d", "g26", "g24", "g25", "g22", "g23", "u1", "u2", "g45", "g46", "c13", "c12", "g33", "mf1", "mf2", "mb1", "mb2", "mb3", "a", "c", "b", "g35", "g34", "g36", "f", "t", "w", "v", "g16", "g15", "g14", "g13", "g12"], "parts": [{"scripts": {}, "showCorrectAnswer": true, 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