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Intersecting circles
RadiowavesFive circles (three concentric) of different sizes, all of which rotate by 180°.
Rainbow AreciboSix intersecting circles turning in steps of 120�.
Rainbow Arecibo PlusSeven (not six) intersecting circles turning in steps of 60�.

Rainium RainbowSeven (not six) intersecting circles turning in steps of 90�.
Rashkey 1First of a series of three similar puzzles. The three differ only by the colours of the pieces.
Rashkey 2Second of a series of three similar puzzles. The three differ only by the colours of the pieces.

Rashkey 3Third of a series of three similar puzzles. The three differ only by the colours of the pieces.
Rhombille Rex IIIThree intersecting circles, one of sixth order and two of third order.
RigelTwo intersecting circles but with two concentric circles of pieces per half.

Rigel2A direct successor of Rigel from the same designer.
Rigel3A direct successor of Rigel from the same designer.
RokettoThree intersecting circles allowing turns in 180° and sometimes 36°.

RotaPlusThe Rotascope with the central piece unbandaged.
Rotator 120Six circles rotatable in steps of 120°
Roto 36Four circles. One with 120°-steps, three with 60°-steps.


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