With 1 & 2 you can get 1, 2, and 3.
2 - 1 = 1, 2 x 1 = 2, 2 + 1 = 3.
With 1, 2 and 3. You can get
1 + 2 + 3 = 6, 3 - 1 + 2 = 4, 1 x 2 + 3 = 5
What other numbers can you get using 1, 2, and 3 ?
You must use each number only once in every sum, and you can use +, -, and x. (add, subtract, mulitply).
How about 1, 2, 3 and 4 ? Or 1, 3, 5, 7, 9 ?
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Try some other numbers. Can you get the numbers from 1 to 20 with any set of numbers?
Take this idea and make up a challenge for us.
what-numbers-can-you-get?
emily p
you have $26,534 and a house you really want costs $27,989
How much more do you need to buy the house?
answer
you need $1,455 to get the house you want
27989 & 26534
27989 can be the last 5 numbers of a cube [ie., n x n x n] but 26534 can not be the last numbers of any cube
The challenges: [1] What is the cube if the last 5 digits are 27989 ? [hint: 12,008,989 = cube for 229]
[2] Why can't 26534 be the last 5 digits of a cube ?
[Hint: 64 = cube for 4, 2744 = cube for 14, 13824 = cube for 24]