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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There are four three-digit n...

There are four three-digit numbers that share this property: the number itself, its double and its triple contain each digit from 1 to 9 exactly once. For example, 192 is one of them because 192, 384, 576 contain 1 to 9 each once. 273 is another one of them because 273, 546, 819 contain 1 to 9 each once. Can you find the other two numbers and calculate the product of these two numbers?
Correct answers: 2
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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Calculate the number 1134

NUMBERMANIA: Calculate the number 1134 using numbers [4, 3, 4, 9, 99, 480] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 5
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #numbermania
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What number comes next?

Look at the series (7, 14, 42, 168, 840, ?), determine the pattern, and find the value of the next number!
Correct answers: 19
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles

A pastor's wife was expecting...

A pastor's wife was expecting a baby, so he stood before the congregation and asked for a raise. After much discussion, they passed a rule that whenever the preacher's family expanded, so would his paycheck.
After 6 children, this started to get expensive and the congregation decided to hold another meeting to discuss the preacher's expanding salary. A great deal of yelling and inner bickering ensued, as to how much the clergyman's additional children were costing the church, and how much more it could potentially cost.
After listening to them for about an hour, the pastor rose from his chair and spoke, 'Children are a gift from God, and we will take as many gifts as He gives us'.
Silence fell on the congregation.
In the back pew, a little old lady struggled to stand, and finally said in her frail voice, 'Rain is also a gift from God, but when we get too much of it, we wear rubbers.'
The entire congregation said, 'Amen.'
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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (10, 11, 12, 13, 25, 26, 28, 38, 39, 41, 61, 68) 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: 6
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare
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A firefighter stood on the m...

A firefighter stood on the middle rung of a ladder, spraying water on a burning house. He then climbed up 6 rungs before the heat of the flames caused him to come down 10 rungs. After some minutes he was able to climb 18 rungs to the very top of the ladder. How many rungs did the ladder have?
Correct answers: 20
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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Find number abc

If 84c3a - 2caac = bbc21 find number abc. Multiple solutions may exist.
Correct answers: 10
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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Calculate the number 7846

NUMBERMANIA: Calculate the number 7846 using numbers [3, 8, 2, 3, 38, 954] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #numbermania
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Find number abc

If b9552 + b597c = 9553a find number abc. Multiple solutions may exist.
Correct answers: 28
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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Calculate the number 8766

NUMBERMANIA: Calculate the number 8766 using numbers [7, 5, 4, 5, 14, 725] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (4, 8, 15, 21, 22, 25, 26, 29, 32, 33) 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: 11
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare
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There are four three-digit numbers that share this property: the number itself, its double and its triple contain each digit from 1 to 9 exactly once. For example, 192 is one of them because 192, 384, 576 contain 1 to 9 each once. 273 is another one of them because 273, 546, 819 contain 1 to 9 each once. Can you find the other two numbers and calculate the product of these two numbers?
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George Francis Train

Died 19 Jan 1904 at age 74 (born 24 Mar 1829).American businessman who was a pioneer in street horse tramways in England, was involved in the formation of the Union-Pacific Railroad, and known as an eccentric reformer. In 1860, following the examples he had seen in America, he established horse tramways in London. Service began on 23 Mar 1860, but was ended within six months, due to opposition caused by his design of rails standing above the road surface sufficiently to cause damage to carriage wheels catching on them. He travelled internationally, and accomplished a speedy round the world trip in 67 days, and may have been the inspiration for Phileas Fogg in Jules Verne's book, Around the World in 80 Days. Train became wealthy from real estate associated with the building of the UP railroad. With age his eccentricity worsened. He died from smallpox. «
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