math geeks easy math question for ten points?

[4u2nv]

1. From a class of 12 students, 3 are chosen to form a school challenge team. The team is required to include at least one boy and at least one girl. If exactly 160 different teams can be formed from the 12 students, then which of the following can be the difference between the number of boys and the number of girls in the class?
a. 0 b. 2 c. 4 d. 6 e. 8

2. An ant searching for food starts from a point A and walks in the north direction for eight minutes reaching a point B; it turns and walks eastwards for another fifteen minutes until it reaches the point C. From C, it walks straight back to its starting point A. I f the ant travels throughout at a constant speed what is the total time taken by the ant for the entire journey?
a. 50min b. 46min c. 23min d. 36min e. 40min

3. If 3 bananas are eaten by 3 monkeys in 3 minutes, then 7 bananas will be eaten by 7 monkeys in
a. 3min b. 4min c. 5min d. 6min d. 7min

[sachaisit]

1.a
2. b
3. a.