Puzzle 197
Can you find anagrams of the following words?
coagulate
cavitates
bacterial
balancers
headlamps
milestone
telephony
dignifies
unnoticed
Puzzle Copyright © Kevin Stone
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Hints
The first letters of the words are: C, A, C, B, L, L, P, S, C.
Answers
coagulate = catalogue
cavitates = activates
bacterial = calibrate
balancers = barnacles
headlamps = lampshade
milestone = lemoniest or limestone
telephony = polythene
dignifies = signified
unnoticed = continued
Puzzle 198
What number comes next in the sequence:
11 · 13 · 17 · 31 · 37 · 71 · 73 · 79 · 97 · ?
Puzzle Copyright © Kevin Stone
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Hint
A very tricky puzzle involving prime numbers.
Answer
101.
These are prime numbers, which, when reversed, are also prime.
Puzzle 199
Can you find a number …
… whose double exceeds its quarter by 7.
Puzzle Copyright © Kevin Stone
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Hint
The number is less than 100.
Answer
4.
4's double is 8, and 4's quarter is 1.
Reasoning
If the missing number is N, then:
2N = N + 7
—
4
Multiply throughout by 4:
8N = N + 28
Subtract N from both sides:
7N = 28
Divide throughout by 7:
N = 4
Puzzle 200
If tomorrow's yesterday is today…
…what day is yesterday's tomorrow?
Puzzle Copyright © Kevin Stone
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Hint
Tomorrow's yesterday is always today.
Answer
Today.
Reasoning
Tomorrow's yesterday is always today.
And yesterday's tomorrow is also always today.
