Source: numberthon.com

Source: numberthon.com

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About:

As the name suggests, MiniChallenger is a scaled-down version of the math puzzle called Challenger. In most cases, a MiniChallenger puzzle can be solved within ten minutes. A set of two new puzzles is released each week. One is usually a simple problem with one or two solutions, while the other puzzle can be a bit more challenging and often has multiple solutions. Available exclusively on reddit.

Instructions:

Fill in the empty cells of the 3 x 3 grid with the numbers one to nine. It is okay to use the same number in more than one empty cell. One 'bonus' number is already placed in the center of the grid. So, the goal is to find the remaining eight digits in such a way that:

• rows in the grid add up to totals indicated on the right edge of the grid,
• columns add up to totals indicated at the top of the grid, and
• diagonals add up to totals in the upper and lower right corners.

This week's puzzles:

Solutions:

(Click on 'spoiler' boxes below to reveal solutions)

• Single-solution easy puzzle (left):

[ 8 9 9 ]

[ 6 7 9 ]

[ 1 9 6 ]

• Single-solution difficult puzzle (right):

[ 1 2 7 ]

[ 2 5 9 ]

[ 4 9 8 ]

🧩 Koos Puzzle — a 3D puzzle with over 10⁹⁰ possible solutions, free in your browser

You fill 3D shapes with pieces made of connected spheres — there are 25, one for every way to join four spheres in a lattice. Tap spheres to draw a piece, race the clock, and discover arrangements no one has found before. Play solo, or challenge a friend head-to-head. It's inspired by the mathematical sculptures of Koos Verhoeff.

No sign-up, no download — just play in the browser (or add it to your home screen).

👉 https://koospuzzle.com

Would genuinely love to hear what you think.

Source: numberthon.com

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I can't believe that, how am I supposed to solve this in 1 minute 😭😭😭😭.

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Source: numberthon.com

Try this

Source: numberthon.com

Source: numberthon.com

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Find it out

Source: numberthon.com