# Daily Brain Teasers for Sunday, 19 May 2019

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

## Find number abc

If 47aba - a90cb = 2c04c 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

## Calculate the number 2432

NUMBERMANIA: Calculate the number 2432 using numbers [5, 6, 7, 7, 30, 158] 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

### An old, tired-looking dog wand...

An old, tired-looking dog wandered into the yard. I could tell from his collar and well-fed belly that he had a home.

He followed me into the house, down the hall, and fell asleep on the couch. An hour later, he went to the door, and I let him out. The next day he was back, resumed his position on the couch and slept for an hour. This continued for several weeks. Curious, I pinned a note to his collar: "Every afternoon your dog comes to my house for a nap."

The next day he arrived with a different note pinned to his collar: "He lives in a home with four children -- he's trying to catch up on his sleep. Can I come with him tomorrow?"

He followed me into the house, down the hall, and fell asleep on the couch. An hour later, he went to the door, and I let him out. The next day he was back, resumed his position on the couch and slept for an hour. This continued for several weeks. Curious, I pinned a note to his collar: "Every afternoon your dog comes to my house for a nap."

The next day he arrived with a different note pinned to his collar: "He lives in a home with four children -- he's trying to catch up on his sleep. Can I come with him tomorrow?"

## MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (3, 4, 10, 14, 15, 21, 33, 42, 70, 71, 77, 88) 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

## Robert S. DietzDied 19 May 1995 at age 80 (born 14 Sep 1914).Robert Sinclair Dietz was an American geophysicist and oceanographer who set forth a theory (1961) of seafloor spreading (a term he coined), in which new crustal material continually upwells from the Earth's depths along the mid-ocean ridges and spreads outward at a rate of several inches per year. While a student Dietz identified the Kentland structure in Indiana as a meteoric impact site. His professors steered him toward marine geology. He became the founder and director of the Sea Floor Studies Section at the Naval Electronics Laboratory (1946-1963). He also achieved prominence by studying meteorite craters, both on Earth and on the moon and arguing that these impact craters were common. He died of a heart attack. |

## Find number abc

If cac69 + 89cc6 = 1a1b05 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 1157

NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] 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

## Find number abc

If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist.The first user who solved this task is

**Nílton Corrêa De Sousa**.#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 539

NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] 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