BRAIN TEASERS

# MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (9, 10, 12, 19, 20, 22, 38, 70, 71, 73, 86) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B-C.
#brainteasers #math #magicsquare

### One Sunday morning William bur...

One Sunday morning William burst into the living room and said, "Dad! Mom! I have some great news for you! I am getting married to the most beautiful girl in town. She lives a block away and her name is Susan.
After dinner, William's dad took him aside. "Son, I have to talk with you. Your mother and I have been married 30 years. She's a wonderful wife but she has never offered much excitement in the bedroom, so I used to fool around with women a lot. Susan is actually your half-sister, and I'm afraid you can't marry her."
William was heart-broken. After eight months he eventually started dating girls again. A year later he came home and very proudly announced, "Diane said yes! We're getting married in June."
William was furious! He finally decided to go to his mother with the news. "Dad has done so much harm. I guess I'm never going to get married," he complained. "Every time I fall in love, Dad tells me the girl is my half-sister."
His mother just shook her head. "Don't pay any attention to what he says, dear. He's not really your father."
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### Siberia

In 1829, the explorer-naturalist Alexander von Humboldt, age 59, began a scientific expedition to uncharted regions of Siberia at the invitation of Tsar Nicholas who also financed the journey. Humboldt crossed Asia, from Russia and Siberia to Mongolia. He recorded temperatures and noted that temperatures varied at the same latitude in accordance with distance from the ocean. As temperature data was collected from a series of Russian weather stations, von Humboldt constructed a world map of temperature, being an early use of isotherms, which he found did not neatly follow latitude. From this he developed the theory of continentality. The expedition ended on 28 Dec 1829. His 3-volume work on Asie Centrale was published several years later.
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