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 Gotchas Puzzle 53 If a red house is made from red bricks and a yellow house is made from yellow bricks... ...what is a greenhouse made from? [Ref: ZMTE] Hint: Think carefully. Answer: Glass! Puzzle 54 One day, one of a pair of identical twins celebrated their first birthday. Two days later, the other twin celebrated their birthday. The twins were born within 5 minutes of each other - so how can this be explained? [Ref: ZAFW] Hint: The twins were born in 1999. Answer: One was born on Feb 28, 1999 just before midnight. The other was born 5 minutes later on Mar 1, 1999. However, the year 2000 is a leap year and Feb 29 had to occur before the second twin could celebrate their birthday. Puzzle 55 How far do you have to travel to reach the North Pole, if you start from the equator and always head North West? [Ref: ZRDG] Hint: Can we reverse the journey? Answer: This route is not possible. If you could arrive at the North Pole whilst travelling North West, you could leave the North Pole travelling South East and reverse our journey. However, you cannot leave the North Pole travelling South East (as everywhere is South), therefore you cannnot arrive whilst travelling North West. You will simply spiral ever closer, and never get there. QED. Puzzle 56 On which side of a cup... ...is it best to have the handle? [Ref: ZCTD] Hint: It's neither LEFT not RIGHT. Answer: The outside!