$$38\div7=5 \text{R} 3$$, three days after Sunday, which is Wednesday. 
This year, October $$28$$ falls on a Sunday. What day of the week will it be after $$38$$ days? (adapted from 2015 Math Kangaroo Problem, Level 3-4, Question \#8) 

Wednesday 
Thursday 
Tuesday 
Friday 
Sunday 