Solve the trees between lampposts vs lampposts between trees puzzle. Can one see lamppost, tree, swing and climbing station in this orders: LTSC, CTLS? Other orders? All orders?
Find sums of vectors. Two vectors (2,1), (4,2). What vector added to the first gives the second?
Tile the plane with 4-gons: shares; skew squares; trapezoids; irregular 4-gons. Apple with 2 bites?
Five apples on the table; two are taken away - how many left? Five candles burning; two are extinguished - how many left?
Return to light bulbs puzzle...
Find sums of vectors. Two vectors (2,1), (4,2). What vector added to the first gives the second?
Tile the plane with 4-gons: shares; skew squares; trapezoids; irregular 4-gons. Apple with 2 bites?
Five apples on the table; two are taken away - how many left? Five candles burning; two are extinguished - how many left?
Return to light bulbs puzzle...
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