On every \( 3^{\text {d }} \) day Ivan goes to the gym to exercise. Every \( 5^{\circ} \) day Gavin goes to the gym to exercise. What is the first day tvan and Gavin will be at the gym on the same day?

6. Six classes, each with 38 pupils, went on an excursion. If one teacher way required to supervise 15 pupils, how many teachers were needed on the excursion?

1. \( 12 \frac{3}{2} \) of a sum of moncy is \( \$ 60 \). What is the sum of money? \( \begin{array}{llll}\text { (A) } \$ 7.50 & \text { (B) } \$ 20.83 & \text { (C) } \$ 72.50 & \text { (if) } 5480.00\end{array} \) ; 2. There are 40 students in a class. Boys make up \( 40 \% \) of the class. If \( 25 \% \) of the boys wear shirts jacs, how many boys wear shirt jacs? \( \begin{array}{llll}\text { (2) } 4 & \text { (B) } 10 & \text { (C) } 16 & \text { (D) } 30\end{array} \)

Calculate \( \left(2.9 \times 10^{6}\right)-\left(7.5 \times 10^{5}\right) \) Give your answer in standard form

166. En una actividad de integración participan 96 nifias y 112 niños. Hay que formar grupos con igual cantidad de integrantes, de tal forma que cada grupo renga la misma cantidad de nifios y la misma cantidad de nifas, Cuíl es la mayor cantidad de grupos que se puede formar y como estanán conformados?

9. \( \frac{(-3)^{6} \cdot 27^{3}}{81^{2} \cdot 243} \) ifadəsinin qiymətini hesa