Brain Teasers
Mr. Fitzgerald's Windows
There are two floors plus the attic in Mr. Fitzgerald's house. Mr. Fitzgerald is repairing all of the windows. He found out that the windows don't all have the same number of glass window panes.
Each window on the second floor has 9 panes on top and 6 on the bottom.
There are two more windows on the first floor than on the second.
Each window downstairs has eight panes of glass on top and eight on the bottom.
The attic has one window with four panes of glass.
Each of the ten rooms of the house has at least one window.
Mr. Fitzgerald has counted 315 panes of glass in all.
Each window needs one new lock. How many locks will Mr. Fitzgerald need for each window to have a new lock?
Each window on the second floor has 9 panes on top and 6 on the bottom.
There are two more windows on the first floor than on the second.
Each window downstairs has eight panes of glass on top and eight on the bottom.
The attic has one window with four panes of glass.
Each of the ten rooms of the house has at least one window.
Mr. Fitzgerald has counted 315 panes of glass in all.
Each window needs one new lock. How many locks will Mr. Fitzgerald need for each window to have a new lock?
Hint
Try making a table and finding a pattern. Maybe an equation will be necessary.Answer
There are 21 windows in all, so 21 locks will be needed.Hide Hint Show Hint Hide Answer Show Answer
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