DAY 05

Comment

Think of a digit under the top ink blot that produces an answer of ninety-something.
What is the smallest digit that does this?

Answer

4.

Readers' methods

Amanda E, Lincoln LN2:
The units column has to add up to ten.
4 is the smallest number which will combine with the 6 already in the units column to make 10.

Amie G, Peacehaven BN10:
4. I added the digits and then I had to make a 10 by the units.