BRAIN TEASERS

# Daily Brain Teasers for Wednesday, 09 January 2019

 puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ...

## Find number abc

If 87c19 - 40ba0 = 4bbb9 find number abc. Multiple solutions may exist.
The first user who solved this task is Fazil Hashim.
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#brainteasers #math

## Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #mastermind

## Calculate the number 3172

NUMBERMANIA: Calculate the number 3172 using numbers [4, 6, 9, 4, 60, 226] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Thinh Ddh.
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#brainteasers #math #numbermania

### How do you tell?

How do you tell when you're out of invisible ink?

Steven Wright (December 6 1955-)

Jokes of the day - Daily updated jokes. New jokes every day.

## Find number abc

If c3c48 - 7b785 = aab63 find number abc. Multiple solutions may exist.
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math

### Safety lamp

In 1816, Sir Humphry Davy's safety lamp was first used in a coal mine. Deadly explosions had been a continual hazard caused by the flammable gas, methane, leaking out of the coal seams ignited by the flame of a miner's lamp. There had been previous attempts by others to make a safety lantern. Davy applied a scientific approach to determine the suitable fineness of wire gauze placed around the flame which would avoid ignition of flammable gas outside. He determined that the holes in the gauze should be less than 1/22 inch in diameter, and that the wire itself should be between 1/40 to 1/60 inch thick. Since the flame changed colour in the presence of methane, it also served as a warning to the miner to take protective action.«[Image: Davy safety lamp, circa 1816.]

## What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
The first user who solved this task is Nílton Corrêa De Sousa.
CHECK ANSWER
#brainteasers #mastermind

## Calculate the number 812

NUMBERMANIA: Calculate the number 812 using numbers [1, 8, 1, 5, 35, 646] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #numbermania

## MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (2, 4, 6, 17, 19, 21, 47, 70, 72, 74, 88, 90) 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.
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#brainteasers #math #magicsquare

## Find number abc

If 8a06a - c584b = 13bbc find number abc. Multiple solutions may exist.
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math

## Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
The first user who solved this task is Djordje Timotijevic.
CHECK ANSWER
#brainteasers #mastermind

## Calculate the number 1662

NUMBERMANIA: Calculate the number 1662 using numbers [4, 3, 8, 2, 10, 532] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Djordje Timotijevic.
CHECK ANSWER
#brainteasers #math #numbermania
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