Children group division

There are 42 children in the yard, and they want to divide into groups of four. How many groups of four can they make, and how many children will they raise?

Final Answer:

a =  10
b =  2

Step-by-step explanation:

$$\begin{gathered} 42=10\cdot 4+2 \\ a=\lfloor 42/4\rfloor =10 \end{gathered}$$

$b=42-4\cdot a=42-4\cdot 10=2$

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