BRAIN TEASERS

# MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (8, 11, 12, 18, 21, 22, 26, 29, 30, 97) 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.
The first user who solved this task is Nílton Corrêa De Sousa.
#brainteasers #math #magicsquare

### Murphy's Laws for Parents

1. The tennis shoes you must replace today will go on sale next week.
2. Leakproof thermoses - will.
3. The chances of a piece of bread falling with the grape jelly side down is directly proportional to the cost of the carpet.
4. The garbage truck will be two doors past your house when the argument over whose day it is to take out the trash ends.
5. The shirt you child must wear today will be the only one that needs to be washed or mended.
6. Gym clothes left at school in lockers mildew at a faster rate than other clothing.
7. The item your child lost, and must have for school within the next ten seconds, will be found in the last place you look.
(Tom's note: Isn't something ALWAYS in the last place you look? I mean, you don't keep looking once you've found it, do you?)
8. Sick children recover miraculously when the pediatrician enters the treatment room.
9. Refrigerated items, used daily, will gravitate toward the back of the refrigerator.
10. Your chances of being seen by someone you know dramatically increase if you drive your child to school in your robe and curlers.
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### Sir Harold Jeffreys

Born 22 Apr 1891; died 18 Mar 1989 at age 97. English astronomer, geophysicist and mathematician who had diverse scientific interests. In astronomy he proposed models for the structures of the outer planets, and studied the origin of the solar system. He calculated the surface temperatures of gas at less than -100°C, contradicting then accepted views of red-hot temperatures, but Jeffreys was shown to be correct when direct observations were made. In geophysics he researched the circulation of the atmosphere and earthquakes. Analyzing earthquake waves (1926), he became the first to claim that the core of the Earth is molten fluid. Jeffreys also contributed to the general theory of dynamics, aerodynamics, relativity theory and plant ecology.«
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