// Numbas version: exam_results_page_options {"name": "Equivalent ratios", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"parts": [{"shuffleChoices": true, "warningType": "none", "showCorrectAnswer": true, "variableReplacementStrategy": "originalfirst", "matrix": ["1", "1", 0, 0, 0], "showFeedbackIcon": true, "marks": 0, "maxMarks": 0, "distractors": ["", "", "", "", ""], "variableReplacements": [], "scripts": {}, "type": "m_n_2", "maxAnswers": 0, "minAnswers": 0, "displayColumns": 0, "displayType": "checkbox", "minMarks": 0, "choices": ["

{a}:{b}

", "

{ax}:{bx}

", "

{c}:{d}

", "

{f}:{g}

", "

{h}:{j}

Identifying equivalent ratios

"}, "extensions": [], "variables": {"h": {"definition": "random(1..20 except [a,b,c,d,f,g,ax,bx])", "description": "", "name": "h", "templateType": "anything", "group": "Ungrouped variables"}, "ax": {"definition": "a*x", "description": "", "name": "ax", "templateType": "anything", "group": "Ungrouped variables"}, "z": {"definition": "random(1..10 except [x])", "description": "", "name": "z", "templateType": "anything", "group": "Ungrouped variables"}, "y": {"definition": "random(2..10 except [x,z])", "description": "", "name": "y", "templateType": "anything", "group": "Ungrouped variables"}, "dx": {"definition": "d*x", "description": "", "name": "dx", "templateType": "anything", "group": "Ungrouped variables"}, "cx": {"definition": "c*x", "description": "", "name": "cx", "templateType": "anything", "group": "Ungrouped variables"}, "dy": {"definition": "d*y", "description": "", "name": "dy", "templateType": "anything", "group": "Ungrouped variables"}, "j": {"definition": "random(1..20 except [a,b,c,d,f,g,h,ax,bx])", "description": "", "name": "j", "templateType": "anything", "group": "Ungrouped variables"}, "c": {"definition": "random(1..10 except [a,b,ax,bx])", "description": "", "name": "c", "templateType": "anything", "group": "Ungrouped variables"}, "cy": {"definition": "c*y", "description": "", "name": "cy", "templateType": "anything", "group": "Ungrouped variables"}, "a": {"definition": "random(1..10)", "description": "", "name": "a", "templateType": "anything", "group": "Ungrouped variables"}, "d": {"definition": "random(1..10 except [a,b,ax,bx])", "description": "", "name": "d", "templateType": "anything", "group": "Ungrouped variables"}, "b": {"definition": "random(1..10)", "description": "", "name": "b", "templateType": "anything", "group": "Ungrouped variables"}, "g": {"definition": "random(1..20 except [a,b,c,d,ax,bx])", "description": "", "name": "g", "templateType": "anything", "group": "Ungrouped variables"}, "bx": {"definition": "b*x", "description": "", "name": "bx", "templateType": "anything", "group": "Ungrouped variables"}, "f": {"definition": "random(1..20 except [a,b,c,d,g,ax,bx])", "description": "", "name": "f", "templateType": "anything", "group": "Ungrouped variables"}, "x": {"definition": "random(1..5)", "description": "", "name": "x", "templateType": "anything", "group": "Ungrouped variables"}}, "contributors": [{"name": "Rachel Staddon", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/901/"}], "functions": {}, "variable_groups": [], "statement": "

Choose the ratios that are equivalent:

", "tags": [], "preamble": {"js": "", "css": ""}, "variablesTest": {"maxRuns": 100, "condition": ""}, "rulesets": {}, "ungrouped_variables": ["a", "b", "c", "d", "x", "y", "ax", "bx", "cy", "dy", "z", "f", "g", "cx", "dx", "h", "j"], "advice": "

Remember that equivalent ratios work like equivalent fractions. If you can multiply both sides of the ratio by the same number to give one of the other ratios, those two are equivalent.

\n

If you prefer to think about it this way:

\n

where a, b, and n are any numbers, a:b is equivalent to a x n: b x n

", "name": "Equivalent ratios", "type": "question"}]}], "contributors": [{"name": "Rachel Staddon", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/901/"}]}