Puzzle 17
You are running in a marathon and you overtake the person in second place.
What position are you now in?
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Answer
If you think that you are now in first place, then think again!
If you overtake the person in second place, you are now in second place yourself!
Puzzle 18
What letter is missing from this sequence:
A A A A ? A A A A A A
Clue: the answer is not A!
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Hint
Think of an alternative alphabet.
Answer
N.
From epsiloN, last letters of the Greek alphabet, alpha, beta, gamma, delta, epsilon, zeta, eta, theta, iota, kappa, lambda, mu.
Puzzle 19
Can you highlight exactly three numbers that add to 17?
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Puzzle Copyright © Kevin Stone
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Hint
You have to highlight three numbers .
Answer
2 + 13 + 2 = 17.
The puzzle didn't ask for three digits to be highlighted!
Puzzle 20
Training Stars #2 – Logic Puzzles
The second group of trainee astronauts are all sitting around the table, waiting to start their first day of training.
From the clues given below, can work out where everyone sits?
Seat 1 is next to Seat 2 and Seat 8, etc. Seat 5 is across from Seat 1, and Seat 7 is across from Seat 3, etc. Seat 2 is a higher seat number than Seat 1, etc.
Harvey has a higher seat number than Jennie.
Peter is across from Harvey.
Neither Joyce nor Lia is in seat 8.
Rick is across from Kenny, and Rick is also next to Joyce.
Lia is next to Kenny.
Jennie is at Seat 4 and next to Harvey.
Peter is next to Lia.
Mark has the remaining seat.
Puzzle Copyright © Randall Fine
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Hint
Where does Harvey sit?
Answer
Seat 1 Peter
Seat 2 Lia
Seat 3 Kenny
Seat 4 Jennie
Seat 5 Harvey
Seat 6 Joyce
Seat 7 Rick
Seat 8 Mark
Reasoning
Jennie is in Seat 4 and next to Harvey (Clue 6), so Harvey is in Seat 3 or Seat 5.
Harvey has a higher seat number than Jennie (Clue 1), so Harvey is in Seat 5.
Peter is across from Harvey (Clue 2), so is in Seat 1.
Peter is next to Lia (Clue 7), so Lia is in Seat 8 or Seat 2. But Lia is not in Seat 8 (Clue 3), therefore Lia is in Seat 2.
Lia is next to Kenny (Clue 5), therefore Kenny must be in Seat 3.
Rick is across from Kenny (Clue 4), so must be in Seat 7.
Joyce is next to Rick (Clue 4), but not in Seat 8 (Clue 3), so Joyce must be in Seat 6.
The last remaining seat (Seat 8) is occupied by Mark (Clue 8).
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