A clock chimes every 20 minutes. A light flashes every 8 minutes. The clock chimes and the light flashes together at 08:00. How many times between 08:01 and 12:30 will the clock chime and the light flash together? Show your working.

39. A grocer bought 20.5 kg of sugar at \( ₹ 14.60 \) per kg . if the sugar bought was in the packets of 250 g each, then how many packets of sugar did the grocer buy and how much did he pay for each packet?

20. Jumlah 20 suku pertama suatu deret aritmetika ialah 500. Jika suku pertama ialah 5 maka suku terakhir deret itu adalah A. 35 B. 39 C. 45 D. 48 E. 52

Leon knows that his first four test grades were \( 92,91,85 \), and 95 . Use the formula \( \bar{x}=\frac{x_{1}+x_{2}+\ldots+x_{n}}{n} \) to find Leon's grade on the fifth test if his test average is 91.2 .

1. Ibu membutuhkan \( 2 \frac{1}{2} \) liter minyak goreng. Ibu mempunyai persediaan minyak goreng \( \frac{2}{3} \) liner. Jika ibu membeli minyak goreng sebanyak \( 1 \frac{1}{2} \) liter, maka minyak goreng yang harus dibeli ibu lagi adalah .... liter. \( \begin{array}{ll}\text { a. } \frac{1}{3} & \text { c. } 1 \\ \text { b. } \frac{2}{3} & \text { d. } 1 \frac{1}{3}\end{array} \)

Questão 2. Jogar baralho é uma atividade que estimula o raciocinio. Um jogo tradicional é a Paciència, que utiliza 52 cartas. Inicialmente são formadas sete colunas com as cartas. A primeira coluna tem uma carta, a segunda tem duas cartas, a terceira tem três cartas, a quarta temı quatro cartas, e assim sucessivamente até a sétima coluna, a qual tem sete cartas, e o que sobra forma o monte, que são as cartas não utilizadas nas colunas. A quantidade de cartas que forma o monte é \( \begin{array}{lll}\text { A. } 21 & \text { C. } 26 \\ \text { B. } 24 & \text { D. } 28 & \text { E. } 31\end{array} \)