Monthly Archive - February 2020brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
Find the right combinationThe 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.
Calculate the number 1558NUMBERMANIA: Calculate the number 1558 using numbers [9, 6, 6, 3, 71, 280] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
MAGIC SQUARE: Calculate A-B-CThe aim is to place the some numbers from the list (5, 8, 11, 18, 21, 24, 31, 67, 70, 73, 84, 95) 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.
Watch For Fallen Rocks
Driving down a remote road, a motorist sees a sign that says: "Watch For Fallen Rocks."
A couple of miles of careful driving later, he spots some pebbles and stops to pick a few up. Arriving in the next town, the motorist carries the stones into the highway maintenance office.
Placing them on the counter, he says to an official: "Here are your fallen rocks. Now where's my watch?"