THE château GUARD WITH HIS TRIDENT
How many prongs do toi see?
I see two on the bottom—but on the top, three
Solution: Cover the haut, retour au début of the trident and toi see two prongs. Cover the bottom and the trident now has three prongs. toi can draw this object, but toi 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 toi are in OPT!
Solution: Angles are sometimes tricky! The red and blue tapes on the envelope are the same length. If toi remove the outline of the envelope, toi can see this. (geometrical-contrast illusion)
THE PRINCESS PICKING A SPECIAL BOUQUET
fleurs fair, fleurs bright.
Which fleur center is larger—the black ou 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
par the sign the royal family will stop. Which line is longer, the bottom ou 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 toi stand on your head. HAPPY BIRTHDAY!”
Solution: You don’t have to stand on your head! If toi turn the book around, toi should see seven blocks with white tops. The number of blocks toi see depends on whether toi view the boxes as having a white haut, retour au début ou a white bottom. (reversible-image illusion)
How many prongs do toi see?
I see two on the bottom—but on the top, three
Solution: Cover the haut, retour au début of the trident and toi see two prongs. Cover the bottom and the trident now has three prongs. toi can draw this object, but toi 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 toi are in OPT!
Solution: Angles are sometimes tricky! The red and blue tapes on the envelope are the same length. If toi remove the outline of the envelope, toi can see this. (geometrical-contrast illusion)
THE PRINCESS PICKING A SPECIAL BOUQUET
fleurs fair, fleurs bright.
Which fleur center is larger—the black ou 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
par the sign the royal family will stop. Which line is longer, the bottom ou 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 toi stand on your head. HAPPY BIRTHDAY!”
Solution: You don’t have to stand on your head! If toi turn the book around, toi should see seven blocks with white tops. The number of blocks toi see depends on whether toi view the boxes as having a white haut, retour au début ou a white bottom. (reversible-image illusion)