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21.
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Identify a number in the grid which meets the two following simple rules:
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a. It is not in any line across which contains a square number.
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b. It is not in any line down which contains a prime number.
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22. A train travelling at a speed of 40mph enters a tunnel that is 2 miles long. The length of the train is 0.5 miles. How long does it take for all of the train to pass through the tunnel, from the moment the front enters to the moment the rear emerges?
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23. Which two words are opposite in meaning?
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interesting, enigmatic, engaging, clear, impossible, solemn.
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24.
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1, 2, 3, 7, 22, ?
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What number continues the above sequence?
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Choose from:
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a.52, b.68, c.126, d.154, e.155.
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25.
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In how many ways can the word SURF be read? Start at the central letter S and surf your way to an adjoining letter up, down, backward or forward, in and out in any direction.
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