MECHANICAL DEVICES SOLUTION |
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DEVICE 1 has three hollows and three protrusions | DEVICE 2 has four hollows and three protrusions | DEVICE 3 has three hollows and four protrusions | DEVICE 4 only has four hollows and cannot be moved |
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Device 3 is the only one with four protrusions, so it must fit into device 4 (four hollows) |
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Devices 1 and 2 both have three protrusions, so either will fit into the hollows on the back of device 3, but: (a) The back of device 2 has four hollows, so device 1 (three protrusions) won't fit; (b) The back of device 1 has three hollows, so device 2 (three protrusions) will fit |
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Therefore device 1 must be inserted into the back of device 3 and device 2 is fitted last |
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HOW TO MANIPULATE THE DEVICES |
01) Rotate the energy beam to flow from 3 to 1, then move 3 to the centre | 02) Rotate the energy beam to flow from 2 to 4, then move 3 into 4 Note that the protrusions on 3 must be facing towards 4 | 03) Rotate the energy beam to flow from 1 to 3, then move 1 to the centre | 04) Rotate the energy beam to flow from 2 to 4, then move 1 into the back of 3 Note that the protrusions on 1 must be facing towards 4 (the back of 3) | 05) Rotate the energy beam to flow from 2 to 4, then move 2 to the centre Note that initially the protrusions will be facing the wrong way | 06) While 2 is in the centre rotate the energy beams to flow from 4 to 2 | 07) Return 2 to it's original position Note that now the protrusions are facing the correct way | 08) Rotate the energy beam to flow from 2 to 4, then move 2 into the back of 1 |
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