\( \frac{8}{8} \quad \frac{7}{4} \quad \frac{1}{4} \) Se reparten 7 chocolates iguales entre 3 amigos para que todos reciban la misma rantidad yo sobre nada. ¿Cuánto recibe cada uno?

Evaluate \(\sqrt ( \frac { 0.0961} { 4.0836- 3.7112} ) \) , correct to four decimal places, hence write the answer in the right form. 

Simplify these fractions. \( \begin{array}{ll}\text { (15) } \frac{16}{20}= & \text { (18) } \frac{9}{81}= \\ \text { (16) } \frac{4}{128}= & \text { (19) } \frac{16}{20}= \\ \text { (17) } \frac{10}{15}= & \text { (20) } \frac{30}{445}=\end{array} \)

11. \( \frac{-3(9-7)}{7+9-2^{3}}= \) 12. \( \frac{4-(2+7)}{13+(6-9)}= \) 13. \( \frac{5(3-8)-2^{2}}{7-3(6+1)}= \)

15. \( 1-(2-3)+8= \) 16. \( 12-4(7-2)= \) 17. \( 18 \div(6+3)-12= \)

(a) What was the TOTAL cost of the stamps? (b) She had to post a parcel and the total cost of postage was \( \$ 25.70 \). What stamps can she select from the collection, to make up this amount if she must use (i) as many \( \$ 4.00 \) stamps as possible? (ii) all her \( \$ 1.00 \) stamps? 3 marks) (c) 2 marks) (i) What is the LARGEST number of stamps that she can use from the collection (ii) List the selection of stamps she can use. 3 marks)