# Daily Brain Teasers for Sunday, 31 December 2023

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

## Find number abc

If c24b1 + aa420 = 1478a1 find number abc. Multiple solutions may exist.#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.#brainteasers #mastermind

## Calculate the number 779

NUMBERMANIA: Calculate the number 779 using numbers [1, 3, 5, 5, 64, 467] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.#brainteasers #math #numbermania

## MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (10, 12, 15, 16, 17, 18, 19, 21, 22, 56, 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.#brainteasers #math #magicsquare

## Breath testIn 1938, the “drunkometer,” the first breath test for car drivers, invented by Dr Rolla N. Harger of Indiana University School of Medicine, was officially introduced in Indianapolis. It was the first successful machine for testing human blood alcohol content by breath analysis. He gave the first “short course” on chemical tests for intoxication (1937). By 1948, Harger and other IU faculty began one-week courses on breath alcohol testing sponsored by the National Safety Council's Committee on Tests for Intoxication. Robert F. Borkenstein, an instructor on those courses later invented the Breathalyzer (1954), a more practical, highly portable instrument for testing breath alcohol. The Drunkometer had required re-calibration when it was moved from place to place. |

## Find number abc

If 75ab8 - 1ac54 = 5c254 find number abc. Multiple solutions may exist.#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.#brainteasers #mastermind

## Calculate the number 2237

NUMBERMANIA: Calculate the number 2237 using numbers [8, 6, 5, 7, 58, 314] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.#brainteasers #math #numbermania

## Find number abc

If 70ba9 + a4ccb = 12a197 find number abc. Multiple solutions may exist.#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.#brainteasers #mastermind

## Calculate the number 714

NUMBERMANIA: Calculate the number 714 using numbers [2, 2, 1, 1, 87, 542] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.#brainteasers #math #numbermania