THE ngome GUARD WITH HIS TRIDENT
How many prongs do wewe see?
I see two on the bottom—but on the top, three
Solution: Cover the juu of the trident and wewe see two prongs. Cover the bottom and the trident now has three prongs. wewe can draw this object, but wewe can’t construct it. (impossible-object illusion)
THE ROYAL MESSENGER ARRIVING WITH A LETTER FOR THE KING
The red tape on the letter is longer than the blue. But is this really true? Remember, now wewe are in OPT!
Solution: Angles are sometimes tricky! The red and blue tapes on the envelope are the same length. If wewe remove the outline of the envelope, wewe can see this. (geometrical-contrast illusion)
THE PRINCESS PICKING A SPECIAL BOUQUET
Flowers fair, flowers bright.
Which maua, ua center is larger—the black au the white?
Solution: The black and white centers are the same size. The white center appears smaller because larger circles surround it. The black center appears larger because smaller circles surround it. (geometrical-contrast illusion)
THE OPT SIGN POINTING THE WAY TO THE ZOO
kwa the sign the royal family will stop. Which line is longer, the bottom au top?
Solution: Both lines are the same length. When the arrows point outward, the line appears shorter. When the arrows point inward, the line appears longer. (geometrical-contrast illusion)
THE BIRTHDAY PARTY FOR THE PRINCE
This gift, unwrapped, tells the Prince’s age.
This is what the dragon said,
“Six blocks become seven if wewe stand on your head. HAPPY BIRTHDAY!”
Solution: You don’t have to stand on your head! If wewe turn the book around, wewe should see seven blocks with white tops. The number of blocks wewe see depends on whether wewe view the boxes as having a white juu au a white bottom. (reversible-image illusion)
How many prongs do wewe see?
I see two on the bottom—but on the top, three
Solution: Cover the juu of the trident and wewe see two prongs. Cover the bottom and the trident now has three prongs. wewe can draw this object, but wewe can’t construct it. (impossible-object illusion)
THE ROYAL MESSENGER ARRIVING WITH A LETTER FOR THE KING
The red tape on the letter is longer than the blue. But is this really true? Remember, now wewe are in OPT!
Solution: Angles are sometimes tricky! The red and blue tapes on the envelope are the same length. If wewe remove the outline of the envelope, wewe can see this. (geometrical-contrast illusion)
THE PRINCESS PICKING A SPECIAL BOUQUET
Flowers fair, flowers bright.
Which maua, ua center is larger—the black au the white?
Solution: The black and white centers are the same size. The white center appears smaller because larger circles surround it. The black center appears larger because smaller circles surround it. (geometrical-contrast illusion)
THE OPT SIGN POINTING THE WAY TO THE ZOO
kwa the sign the royal family will stop. Which line is longer, the bottom au top?
Solution: Both lines are the same length. When the arrows point outward, the line appears shorter. When the arrows point inward, the line appears longer. (geometrical-contrast illusion)
THE BIRTHDAY PARTY FOR THE PRINCE
This gift, unwrapped, tells the Prince’s age.
This is what the dragon said,
“Six blocks become seven if wewe stand on your head. HAPPY BIRTHDAY!”
Solution: You don’t have to stand on your head! If wewe turn the book around, wewe should see seven blocks with white tops. The number of blocks wewe see depends on whether wewe view the boxes as having a white juu au a white bottom. (reversible-image illusion)