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 Puzzle 957 How many times per day do... ...the hour and minute hands of a clock form a right angle? [Ref: ZRCV] Direct Link: www.brainbashers.com?ZRCV Hint: Think carefully at 3 and 9 o'clock. Answer: 44. Twice each hour equals 48, except 3am, 9am, 3pm, 9pm cause us to lose one each. i.e. we only have 3 from 2am to 4am, and not the normal 4. Puzzle 958 What number comes next in this sequence: 1 2 6 24 120 ==?== [Ref: ZCHT] © Kevin Stone Direct Link: www.brainbashers.com?ZCHT Hint: 120 = 24 x 5. Answer: 720. Each term is a factorial, 6! = 1*2*3*4*5*6 = 720. Puzzle 959 It burns no coal, no oil, no nuclear fuels and has no need for electricity. It uses no man made explosions. Yet it is far hotter than all ovens and fires and furnaces. What is it? [Ref: ZERS] Direct Link: www.brainbashers.com?ZERS Hint: It's something you hope to see most days. Answer: The sun. Although its energy is generated by the nuclear fusion of hydrogen nuclei into helium, no nuclear fuels (e.g. uranium) are involved. Puzzle 960 I have 55p in my pocket. Can you tell me what two coins they are if I say that one of them is not a 5p coin? [Ref: ZWVH] Direct Link: www.brainbashers.com?ZWVH Hint: This might be a trick question. Answer: 50p and 5p: one of the coins is not a 5p but the other one is!

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