[DB151] Colin's Score

151 - Colin's Score

Colin's Score (John's Score in the UK version) is a puzzle in Professor Layton and the Diabolical Box.

Puzzle

Four students took a test where every question had two possible answers, A or B. Each question was worth 10 points, for a total of 100 points.

US Version

The students' test results were posted as seen below, but the teacher forgot to tally Colin's score. Colin was heading to the teacher's office when Mary called him back, saying they could figure out his score using the results from the other tests. Can you figure out Colin's score?

UK Version

The students' test results were posted as seen below, but the teacher forgot about John's score. John was heading to the teacher's office when Mary called him back, saying they can determine his score using the results from the other tests. Can you work out John's score?

Hints

Click a Tab to reveal the Hint.

US Version

This is a hard puzzle, so maybe this hint will help. The first thing you need to do is create an answer key based on the three scored tests.

Since Mary got the highest score, try creating a key that compares her answers to everyone else's.

UK Version

To solve this puzzle, you'll need to work out what are the correct answers to the 10 questions. The easiest way to do this is to create a chart showing the potential correct answer for each question, compare it to the test results and adjust it so that it matches each person's score. Since Mary got seven questions right, her answers should be the starting point for your answer key. Pay attention to where her answers differ from everyone else's.

US Version

The three graded tests agree on four questions. However, you know that not all four of these are correct because Lisa only got a score of 30. You also know that not all of these "agreed" answers are incorrect because Mary had a score of 70.

UK Version

Are you finding it hard to find the correct answers? Using some common sense can give you a head-start. If all four students answered a question in the same way it's quite likely that it's the correct answer, isn't it?

US Version

You can make multiple answer keys that will all yield the same results. As long as you find one of these keys, you can solve this puzzle.

UK Version

You'll have noticed that all four people agreed on an answer for four questions. They can't all be correct, though, since Lisa only got 30 points. Let's assume that three of them are correct, then...

Solution

Incorrect

Too bad!

You need to narrow down the conditions. This puzzle's a tough one.

Correct

A+!

US Version

An A+ for you, that is. Unfortunately for Colin, his score was 60 points.

Based on the results from the three scored tests, you could come up with four possible answer keys, labeled here as A through D. No matter which one you use, Colin's score is 60!

UK Version

An A+ for you, that is. Unfortunately for John, his score was 60 points.

Based on the results from the three scored tests, you could come up with four possible answer keys as shown. No matter which one you use, John's score is 60!

v · d · ePuzzles in Professor Layton and the Diabolical Box

Normal	001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 UK 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 UK 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153

Weekly	See here for weekly puzzles.

Hidden Door	???

Puzzle Index: CV · DB · UF · LS · MM · AL · VS