# Daily Brain Teasers for Friday, 11 January 2019

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

## What is the missing number?

What is the missing number?The first user who solved this task is

**Chandu Rajyaguru**.#brainteasers #math #riddles

## Calculate the number 5543

NUMBERMANIA: Calculate the number 5543 using numbers [5, 1, 2, 5, 52, 873] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.The first user who solved this task is

**Eugenio G. F. de Kereki**.#brainteasers #math #numbermania

## MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (1, 2, 4, 15, 16, 18, 28, 29, 31, 67, 72, 91) 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

### New Hearing Aids

An elderly gentleman had serious hearing problems for a number of years.

He finally went to a doctor, and was fitted with excellent new hearing aids.

He returned a month later for a checkup, and the doctor said, “Your hearing is perfect! Your family must be really pleased that you can hear again.”

The gentleman replied, “Oh, I haven't told my family just yet. I still sit around quietly; but, now I listen to the conversations. I've changed my will three times already.

## Find number abc

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

**Fazil Hashim**.#brainteasers #math

## Gail BordenDied 11 Jan 1874 at age 72 (born 9 Nov 1801). American manufacturer who invented a commercial method of condensing milk by heating it in a vacuum to preserve it (patented 19 Aug 1856, U.S. No. 15,553) and investigated other food concentrates. He began with a process (patented 5 Feb 1850, No. 7,066) that cooked meat extracts with flour to form a meat biscuit capable of long term storage. When he devised a way to preserve milk by condensing it, he created a market in big cities which were distant from the farm sources, as well as supplying the military, travellers and seamen. The dairy company he founded (renamed Borden, Inc., in 1968) expanded and diversified to become a sizable conglomerate. |

## 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**.#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**.#brainteasers #math #numbermania

## 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**.#brainteasers #math

## 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**.#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**.#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**.#brainteasers #math #magicsquare