1. A number m is formed by writing all the prime numbers between 0 and 10 in an ascending order. Another number \( n \) is formed by writing all the square numbers between 0 and 10 in a descending order. (a) Find \( \mathrm{mI}-\mathrm{n} \). (b) Express \( (\mathrm{m}-\mathrm{n}) \) as a product of its prime factors.

Rafael wants to buy the same number of gift bags and bows. Gift bags are sold in packs of 6 . Bows are sold in packs of 9 . What is the least number of gift bags and bows that Rafael can buy?

3. O preço da gasolina nas refinarias é de \( R \$ 2,08 / \) litro, o que significa um reajuste de \( +4,0 \% \) em relaçäo aos valores anteriores. Na bomba, essa gasolina, após a inserção de todos os impostos e lucro do posto, passa a custar \( R \$ 5,72 / \) litro. a. Qual era o preço da gasolina nas refinarias antes do aumento?

Sinhle's mom gave him \( R_{20} \) to go to the shop. He buys a coke for \( R_{10,} \) a lollipop for \( R_{2} \) and a packet of chips for \( R_{5} \). What is his change? Show your calculations below.

d. \( 1-\left[\frac{4}{5}+\left(-\frac{2}{21}-\frac{8}{14}\right)-\left(\frac{4}{3}-\frac{11}{5}+1\right)\right]+\frac{15}{6}-\left(3+\frac{7}{9}-\frac{5}{3}\right)+1 \).

Find the factors of 20. Complete the factor pair. 20: \( 1,2,[],[,, \square,[?], 20 \) Enter the number that belongs in the green box. Hint: What times 2 is 20 ?