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Logical Puzzles Questions and Answers

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28. Which does not belong in this sequence?
Ans: E.
Sol.
The black dot is moving one corner clockwise at each stage and the white dot is moving one corner anti-clockwise at each stage.
 
29. 5 friends live in the same road A, B, C, D, E. The numbers of B, C, D when multiplied together equals 1260. The numbers B,C, D when added equal twice E’s number, and is even. A’s number is half as much again as E’s. The road numbers run from 2 to 222. What are the 5 house numbers?
Ans: A 36, B 4, C 9, D 35, E 24.
Sol.
A 36
B 4
C 9
D 35
E 24
 
 
30. A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?
Ans: 59.
Sol.
The first 56 balls could be of all colours except red. This would leave 8 balls, all of which are red, so any three chosen would be red.