# Daily Brain Teasers for Saturday, 12 February 2022

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

## 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.#brainteasers #mastermind

## Calculate the number 3954

NUMBERMANIA: Calculate the number 3954 using numbers [9, 8, 5, 6, 80, 971] 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 (6, 8, 15, 19, 21, 26, 28, 61, 63, 70) 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

## Find number abc

If c10bb + 1baab = a00b6 find number abc. Multiple solutions may exist.#brainteasers #math

## Electrostatic generator patentIn 1935, a patent was issued to Robert Jemison Van de Graaff for his Electrostatic Generator design (U.S. No. 1,991,236), able to generate direct-current voltages much higher than the 700,000-V which was the state of the art at the time using other methods. It consisted of two large, hollow approximately spherical metal domes on insulated columns. A silk belt ran on rollers between the base of the column to the interior of the dome. Charges from a 5000-V source are transferred to the belt near the lower roller, carried upward and are collected by a metal comb connected to the dome interior. By nature, rather than accumulating on the interior, the charges move to the exterior of the dome. Two such domes with opposite charges could generate a potential difference of 1,500,000-V between them. |

## 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.#brainteasers #mastermind

## Calculate the number 3398

NUMBERMANIA: Calculate the number 3398 using numbers [2, 6, 5, 7, 26, 573] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.#brainteasers #math #numbermania

## Find number abc

If c6275 + 5ba23 = 1ba29c find number abc. Multiple solutions may exist.#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.#brainteasers #mastermind

## Calculate the number 9023

NUMBERMANIA: Calculate the number 9023 using numbers [6, 6, 7, 1, 90, 745] 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 (9, 12, 14, 23, 26, 28, 30, 33, 35, 64) 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