Answers to December Mindbenders
How the years fly!
It is the 31st of December. Adam's birthday is on the 2nd of January,
so he was still 9 on the 1st of January 'last year'.
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Number Puzzle
Give each row a number, counting up from zero at the bottom. Then each
number is the sum of the numbers at the bottom of the triangle topped by
that number, plus the row number.
So the number at the top is 9 + 1 + 3 + 7 + 2 + 4 + 5 = 31.
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