BRAIN TEASERS
Math

Math

These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 1 to 10.
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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (20, 21, 23, 25, 30, 31, 35, 65, 66, 70) 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.
Correct answers: 0
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Find number abc

If 880c7 - bb71a = 5cbb5 find number abc. Multiple solutions may exist.
Correct answers: 0
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Calculate the number 2753

NUMBERMANIA: Calculate the number 2753 using numbers [4, 2, 2, 4, 62, 905] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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Why English is tough

Twenty-one reasons why English is hard to learn.
1. The bandage was wound around the wound.
2. The farm was used to produce produce.
3. The dump was so full it had to refuse more refuse.
4. We must polish the Polish furniture.
5. He could lead if he would get the lead out.
6. The soldier decided to desert his dessert in the desert.
7. Since there was no time like the present, he thought it was time to present the present.
8. A bass was painted on the head of the bass drum.
9. When shot at, the dove dove into the bushes.
10. I did not object to the object.
11. The insurance was invalid for the invalid.
12. There was a row among the oarsmen on how to row.
13. They were too close to the door to close it.
14. The buck does funny things when does are present.
15. A seamstress and a sewer fell down into a sewer line.
16. To help with planting, the farmer taught his sow to sow.
17. The wind was too strong to wind the sail.
18. After a number of injections my jaw got number.
19. Upon seeing the tear in the painting I shed a tear.
20. I had to subject the subject to a series of tests.
21. How can I intimate this to my most intimate friend?
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Find number abc

If 972cb - 17aca = 79c94 find number abc. Multiple solutions may exist.
Correct answers: 0
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Calculate the number 883

NUMBERMANIA: Calculate the number 883 using numbers [5, 2, 9, 7, 27, 823] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (12, 13, 16, 20, 21, 24, 29, 30, 32, 33, 59) 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.
Correct answers: 0
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#brainteasers #math #magicsquare
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Find number abc

If 65c5b - b5ac3 = 3a50a find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 648

NUMBERMANIA: Calculate the number 648 using numbers [6, 1, 8, 4, 36, 267] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania
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Find number abc

If b7aaa + 3b30c = 489a8 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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Calculate the number 2589

NUMBERMANIA: Calculate the number 2589 using numbers [8, 8, 3, 9, 99, 965] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania
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James Nasmyth on the form of lightning

In 1856, James Nasmyth spoke “On the Form of Lightning” on the opening day of the 26th Meeting of the British Association at Cheltenham. He said that he wanted to call attention to the fact that Nature never showed a zig-zag dovetail form of lightning as often portrayed by painters and in other works of art. The true natural form was irregular curved lines, single or branched. He attributed the artists' error to the form of the thunderbolt in the hand of Jupiter, as sculptured by the early Greeks. He thought lightning mostly shot up from the earth to the cloud and often continued from the cloud downwards again to another distant part of the earth. The appearance of the lightning, he conceived, was of a rapidly shooting point of light, leaving on the eye the impression of the path it traced. Animated discussion followed.«[Image upper: artists' dovetail form of lightning. Lower: natural form. Illustrations from the Report of the Annual Meeting (1856).]
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