Math ECA

Which of the following can be folded to make a square based pyramid?

• A

• B

• C

• D

• E

Which of the following numbers is eight thousand and seventy-nine?

• 80079

• 8079

• 879

• 8790

• 80709

Jillian is standing inside a pet shop and looking out the window shown in the diagram. What does she see?

• A

• B

• C

• D

• E

Adam, Barney and Joe carry 999 books out of the library. Adam works for 3 hours, Barney works for 4 hours and Joe works for 5 hours. They work at different speeds, with Adam carrying 5 books

for every 3 books Barney carries and every 2 books Joe carries. How many books did Adam carry?

(a)  

The sum of six consecutive positive integers is 2013. What is the largest of these six integers?

• 335

• 338

• 340

• 345

• 350

Calculate: 13 × 35 + 12 × 0.6 + 25 × 40%

• 13

• 12

• 25

• 2.5

• 1.3

Julia drew the picture on the side of a cardboard sheet, cut, folded, and glued to form a cube. Which of the cubes below can be the one she made?

• A

• B

• C

• D

• E

Answer

• A

• B

• C

• D

• E

As shown in the figure, point O is a point on the line EF, OA ⊥ OC, OB ⊥ OD, and OF bisects ∠COD. If ∠DOF = 25°, what is the measure of ∠AOB?

• 25度

• 45度

• 50度

• 65度

• 75度

As shown in the graph below, a regular pentagon and a regular hexagon are placed together on a line. Find ∠ABH.

• 48度

• 50度

• 56度

• 62度

• 68度