Brain Developing Math Puzzles for Everyone.

Eliminate the middle runner from the given relations to reveal that A beats C by 44 meters in a 100-meter race.

Solve the twisted three runners puzzle by setting equations from distance equals speed times time, equating times, and finding the race length as 48 miles.

solve four runners puzzle by establishing A to B, B to C, and C to D relations, then eliminate middlemen to find A’s lead over D in a 400 m.

Explore Ramanujan's magic square by arranging numbers so that every row, column, and diagonal sums to the same constant, such as 139, when the square is divided into four parts.

Explore how many possible shidoku grids exist by analyzing nine-by-nine sudoku and four-by-four mini sudoku, breaking the grid into four sub-squares, then multiplying available placements.

Analyze how a point inside an 18 by 40 rectangle is closer to the longer sides than to the other three sides, concluding the probability is 3/8.

Model the dinner date problem by letting arrival times X and Y in minutes after 8, locate the region 60 by 60 square where |X-Y|<=20, and derive probability 5/9.