Mathematical Problem Solving

How many rectangles are there in the figure below?

• 6

• 10

• 15

• 13

• 14

February 2017 has 28 days. The number of days in this year's February is how many times of the number of days in one week?

• 4 times

• 7 times

• 21 times

• 35 times

• None of the above

There were 400 members in a chess club last year. The number of members decreased by 5% this year. How many members are there in the chess club this year?

• 395

• 390

• 385

• 380

• 375

The product of all the factors of 10 is equal to _______.

• 17

• 100

• 50

• 200

• 10

The sum of two prime numbers is always ______

• even

• divisible by 3

• odd

• greater than 3

• prime

The letters in the word MATHEMATICIAN were put in a box. What is the chance of getting letter A?

• 3 out of 9

• 3 out of 10

• 3 out of 13

• 1 out of 11

• 3 out of 11

What fraction of this square is shaded if the line inside divides the square into two equal parts?

• 1/2

• 1/3

• 3/8

• 3/5

• 3/4

Mr. Cho received a container of fresh eggs. He sold 1/3 of the eggs in the morning and sold 320 eggs in the afternoon. At the end of the day, he found that 1/4 of the eggs were not sold. How many eggs did he receive in the beginning?

• 768

• 448

• 549

• 1224

• 1600

Cindy saved $15 in the first month, $30 in the second month, $45 in the third month, and so forth. The amount of money she saved in the last month was $120. How much money did Cindy save in total?

• 210

• 300

• 350

• 420

• 540

A number is added to 3. The sum is then multiplied by 5. When 8 is subtracted from the product, the result is 12. What is this number?

• 5

• 4

• 3

• 2

• 1