Daily Brain Teasers for Wednesday, 14 October 2026
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Find number abc
If c02aa + 74aba = 12c2b8 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 3934
NUMBERMANIA: Calculate the number 3934 using numbers [1, 6, 5, 4, 97, 592] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
My memory
An agitated patient was stomping around the psychiatrist's office, running his hands through his hair, almost in tears.
"Doctor, my memory's gone. Gone! I can't remember my wife's name. Can't remember my children's names. Can't remember what kind of car I drive. Can't remember where I work. It was all I could do to find my way here."
"Calm down. How long have you been like this?"
"Like what?"
Find number abc
If 644b1 + 9c6ac = 162baa find number abc. Multiple solutions may exist.
#brainteasers #math
Metric SystemIn 1960, the fourth legal definition of the metre was made to be 1,650,763.73 wavelengths in vacuum of the orange-red light radiation of the krypton-86 atom (transition between levels 2p10 and 5d5). It was adopted at the 11th meeting of the Conférence Générale des Poids et Mesures (CGPM), which also specified the seven basic units of the SI system. It was superceded by a fifth definition of the metre on 20 Oct 1983, based on the speed of light. The definition in terms of wavelengths of the kryton spectral line wasthen100 times more accurate than the previous third legal definition adopted in 1889. (The third legal definition on 28 Sep 1889, was based on the distance between two reference markson the International prototype metre bar, made of platinum-iridium, (90% Pt, 10% Ir), cross section X, at a 0 °C temperature.)«[Image: Krypton-86 gas excited by high-frequency oscillator, in a vessel cooled to the temperature of liquid nitrogen to produce precise monochromatic radiation. The special lamp is placed in front of an interferometer calibrated in wavelengths.] |
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 443
NUMBERMANIA: Calculate the number 443 using numbers [2, 9, 7, 1, 22, 154] 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, 14, 16, 22, 26, 28, 29, 31, 34, 37, 64, 68, 73) 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 37a8b - 3c563 = abc6 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 1467
NUMBERMANIA: Calculate the number 1467 using numbers [8, 6, 5, 5, 91, 959] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
