Stretch Your Thinking. Write an addition equation. The equation must have a 1-, a 2-, and a 3-digit addend and use all of these digits: 6, 6, 2, 2, 8, 8, 0, 0, 0
So what’s the answer?
Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
I am thinking of a two-digit number.
If I write 3 to the left of my number, and double this three-digit number, the result is 27 times my original number.
What is my number?
The digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 can be arranged into an addition sum to add up to almost any total, except that nobody has yet found a way to add up to 1984. However 9 digits can equal 1984 by an addition sum. Which digit is omitted?
Use 1 to 9 digit and make 9 pairs (a,b) such that a/b=1/2, 1/3, 1/4...1/9?
Example: One such pair is (6729, 12358) where 6729/13458=1/2