It takes the average reader 1 hour and 41 minutes to read Optical Illusions by Katherine Joyce
Assuming a reading speed of 250 words per minute. Learn more
Seeing shouldn't always be believing... It all depends on how you look at it--every one of these drawings has a built-in "deception." For example, in this picture how many cubes are there: 7 or 8? Count again: if you're focusing on the black tops, you'll come up with 8, but if your eye is on the white bottoms, you'll find 7 cubes. Some images show two things in one, others confound your perception so you won't be able to judge size, and still more seem to sparkle and pulse. You won't be able to take your eyes off them! 96 pages, 86 b/w illus., 4 x 5.
Optical Illusions by Katherine Joyce is 98 pages long, and a total of 25,284 words.
This makes it 33% the length of the average book. It also has 31% more words than the average book.
The average oral reading speed is 183 words per minute. This means it takes 2 hours and 18 minutes to read Optical Illusions aloud.
Optical Illusions is suitable for students ages 10 and up.
Note that there may be other factors that effect this rating besides length that are not factored in on this page. This may include things like complex language or sensitive topics not suitable for students of certain ages.
When deciding what to show young students always use your best judgement and consult a professional.
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