Write 1000 using three 13s The brother of a classmate, who is in elementary school, got the following homework, but he can't figure it out. So his brother shared it to see if someone in his class could help out with it:
&quot;Write the number 1000 with 3 numbers 13&quot;. Only the standard arithmetic operations of addition, subtraction, multiplication, and division are allowed.
How does one solve this problem?
If you can break up the $13$'s:
$(13-1\times 3)^{1\times3} = 1000$.
Is this allowed ?
$$(1(13-13))^3=(10)^3$$