Try to make 98 using the number 6, 7, 8, 9
Rules:
Allowed operations are: +, -, *, /, ^
Must use all numbers exactly once
Brackets are allowed (but not as binomial coefficients)
Any other operations are not allowed.
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I came across an intriguing claim during my visit to LEGO House in Billund:
The display states that Danish mathematician Søren Eilers calculated 915,103,765 unique ways to combine six identical LEGO 2x4 bricks. This number supposedly accounts for every possible stacking, offset, and rotational c...
The following puzzle is from Brain Teasers for Puzzlers by Gareth Moore.
Find a continuous non-intersecting loop that passes through the center of each cell in the grid. Between each cell marked with a black circle, the loop has exactly one 90 degrees bend.
This looks like a variant of Masyu. ...
0
The digits from 1 to 9 are each used exactly once to write three one-digit integers and three two-digit integers. The one-digit integers are equal to the length, width and height of a rectangular prism. The two-digit integers are equal to the areas of the faces of the same prism. What are the dim...
