# Daily Brain Teasers for Thursday, 13 February 2020

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

## MAGIC SQUARE: Calculate A+B*C

The aim is to place the some numbers from the list (12, 13, 19, 20, 21, 27, 31, 32, 38, 61) 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

## Find number abc

If bb8a1 + 4b9bc = ac78a 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

**Nasrin 24 T**.#brainteasers #mastermind

### A man walked into a restaurant...

A man walked into a restaurant and saw a sign that read, "We'll give you $300 if we're unable to serve you any entree you order."

He sat down and told the waitress he wanted elephant liver on rye.

The waitress took the order and left.

All of a sudden, the man heard terrible noises coming from the kitchen - the sound of feet stamping, screaming and the banging of pots and pans.

It went on and on.

The noise finally stopped, and the cook appeared from the kitchen.

He slapped down $300 in front of the customer and said, "I can't believe it. We're out of rye."

He sat down and told the waitress he wanted elephant liver on rye.

The waitress took the order and left.

All of a sudden, the man heard terrible noises coming from the kitchen - the sound of feet stamping, screaming and the banging of pots and pans.

It went on and on.

The noise finally stopped, and the cook appeared from the kitchen.

He slapped down $300 in front of the customer and said, "I can't believe it. We're out of rye."

## Calculate the number 3800

NUMBERMANIA: Calculate the number 3800 using numbers [7, 4, 1, 3, 91, 889] 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

## ENIAC first operatedIn 1946, the world's first electronic digital computer, ENIAC (the Electronic Numerical Integrator and Calculator) was first demonstrated at the Moore School of Electrical Engineering at the University of Pennsylvania, by the late John W. Mauchly and J. Presper Eckert. The ENIAC machine occupied a room 30 by 50 feet. Its birth lay in WW II as a classified military project known only as Project PX. The ENIAC is historic because it laid the foundations for the modern electronic computing industry. The ENIAC demonstrated that high-speed digital computing was possible using the vacuum tube technology then available. Built out of some 17,468 electronic vacuum tubes, ENIAC was in its time the largest single electronic apparatus in the world. |

## Find number abc

If 38034 + b5aa3 = c33ab7 find number abc. Multiple solutions may exist.The first user who solved this task is

**Nasrin 24 T**.#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

**Nasrin 24 T**.#brainteasers #mastermind

## Calculate the number 1114

NUMBERMANIA: Calculate the number 1114 using numbers [2, 7, 1, 7, 83, 180] 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 (8, 9, 14, 24, 25, 30, 45, 46, 51, 89) 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

**Nasrin 24 T**.#brainteasers #math #magicsquare

## Find number abc

If 4a234 + 40cb3 = 8aa0b find number abc. Multiple solutions may exist.The first user who solved this task is

**Nasrin 24 T**.#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

**Nasrin 24 T**.#brainteasers #mastermind