~\uline{~~~~~~~~~~}~$\div$ $7=$~\uline{~~~~~~~~~~}~$R1$  $36-1=35$, $35\div7=5$, so the answer is $D$. 
A box has fewer than $50$ cookies in it. The cookies can be divided evenly between $2, 3,$ or $4$ children. However, they cannot be divided evenly between $7$ children because $6$ more cookies would be needed. How many cookies are there in the box? (2021 Math Kangaroo Problem, Level 3-4, Question \#21) 

* $$12$$ 
* $$24$$ 
* $$30$$ 
* $$36$$ 
* $$48$$ 