Puzzle 1
Can you highlight exactly three numbers that add to 19?
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
6 + 1 + 12 = 19.
The puzzle didn't ask for three digits to be highlighted!
Puzzle 2
What comes next in this sequence:
hydrogen helium lithium beryllium boron ?
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Hint
You might need a periodic table.
Answer
Carbon.
From the elements, in increasing order of atomic number.
Puzzle 3
I have a jar of sweets that contains 114 red, 35 blue, 67 green, and 9 yellow.
What chance do I have of picking a yellow sweet with my eyes shut?
Puzzle Copyright © Kevin Stone
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Hint
How many yellow sweets are there, how many sweets in total?
Answer
1 in 25 = 4 percent.
Reasoning
In total, there are 114 + 35 + 67 + 9 = 225 sweets.
There are 9 yellow sweets, so the probability is 9 ÷ 225 = 0.04 = 4% = 1 in 25.
Puzzle 4
Can you find three words …
… which contain two consecutive i's.
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Hint
The words begin with the letters R, S, T.
Answer
RADII, SKIING, TAXIING.
You could also have GENII.
