Yosef bought some pies for his birthday celebration.

He shared them with his three friends, Chris, Jane and Megan.

Chris ate half of the total number of pies and another half a pie.

Jane ate half of the remainder and another half of a pie.

Megan ate half of the number of pies left and another half a pie.

Finally, Yosef ate half the number of pies left and another half a pie.

There were no pies left after that. How many pies did Yosef buy?

Lenny earns a over the summer working at the waterpark. He deposited half of the money in an account that earns interest compounded monthly. He deposited another half of a buddy in an account that earns interest compounded continuously. Assuming there are no other deposits or withdrawals, Find the difference of the amount earned on his two investments after years. 

Which of the following is the correct graph of the solution to the inequality −13 > −5x + 2 > −28?

a) number line with open dots at 3 and 6 and shading in between.

b) number line with a closed dot at 6 with shading to the right and another closed dot at 3 with shading to the left.

c) number line with an open dot at 6 with shading to the right and another open dot at 3 with shading to the left.

d) number line with closed dots at 3 and 6 with shading in between.

X is a 2-digit number. When X is divided by 5, it has a remainder of 2. Another 2-digit number, Y, when divided by 20, has a remainder of 3. What is the largest possible difference between the two numbers?