BRAIN TEASERS

# What is the missing number?

MATH PUZZLE: Can you replace the question mark with a number?
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles

### Three women: one engaged, one...

Three women: one engaged, one married and one a mistress, are chatting about their relationships and decided they needed to spice up their love lives. All three agreed to wear black leather bras, stiletto heels and a mask over their eyes that evening with their respective lovers.
After a few days they meet up for lunch and compared notes.
The engaged woman: "The other night when my boyfriend came over he found me with a black leather bodice, tall stilettos and a mask. He saw me and said, 'You are the woman of my life. I love you.' Then we made love all night long."
The mistress: "Me too! The other night I met my lover at his office and I was wearing the leather bodice, heels, mask over my eyes and a raincoat. When I opened the raincoat he didn't say a word, but we had wild sex all night."
The married woman: "I sent the kids to stay at my mother's house for the night when my husband came home I was wearing the leather bodice, black stockings, stilettos and a mask over my eyes. As soon as he came in the door and saw me he said, 'What's for dinner, Batman?'"
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## Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

### 3D projector

In 1901, Claude Grivolas, one of Pathe's main shareholders in Paris, France, patented a projector for three-dimensional (stereoscopic) movies viewed wearing spectacles with one red and one blue lens (French patent No. 310,864). He received a British patent on 23 May 1901 (No. 10,695) For filming, he used a dual camera arrangement which photographed images alternately. He then created one composite master film with the left camera images alternated with the right camera image. His projector had a shutter with one red and one blue transparent sections, with opaque quadrants between them. Left-eye images were projected through the blue filter followed by right-eye images in red light. The movie appeared black and white when viewed using red/blue spectacles.*[Image: rotating shutter with red and blue quadrants alternately project left (L) and right (R) frames of movie film.]
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