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6 Riddles
3 min
0 Solvers
233 Views
Classroom
What object is black when it's clean and white when it's dirty?
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The Answer
A chalkboard (or blackboard)
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Office
I become darker the more you wash me, yet lighter when stained. What am I?
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The Answer
A whiteboard
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Cleaning
What gets whiter as it gets filthier, and blacker as it gets polished?
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The Answer
A chalkboard eraser
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School
I am born black, turn white with use, and am often found near a duster. What am I?
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The Answer
A chalkboard
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Writing
What becomes visibly white only when covered in dust, but pitch black when wiped fresh?
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The Answer
A chalkboard surface
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Teacher's tool
What's the opposite of normal: clean = dark, dirty = light?
Reveal
The Answer
A blackboard
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How To
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Did You Know?
The first modern blackboard was invented by James Pillans, a Scottish headmaster, in the early 1800s.
Before blackboards, students used individual 'hornbooks' — wooden paddles with lessons attached.
A standard chalkboard eraser can hold up to 10,000 chalk particles after a month of use.
The world's largest chalkboard is over 100 meters wide and is located in China.
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