Place the digits 1 through 9 in the empty boxes in a special way.
Find the one-digit number that is just like all the others.
How many times will Allison write the digit 3?
They say you cannot add apples and oranges. You do in this puzzle! Can you break the code?
Find the missing base numbers.
How many pairs of “magic” numbers exist?
When will the digits of a digital clock be in strictly increasing order? In strictly decreasing order?
Follow the pattern and determine the number of people who get on and off the train.
Find a way to sum a set of even integers.
How many darts will Seong-Chang need to throw to earn a specific number of points?
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