Logic problems - Revision

20 trees are planted in a straight line. The distance between two adjacent trees is 13m. What is the exact distance between the first and the last tree in this line?

• 260 m

• 247 m

• 273 m

• 280 m

Tags

CCSS.4.MD.A.2

The sum of the present age of a son and his father is 60 years. Six years ago, the father's age was five times the age of the son. How old is the son now?

• 8

• 10

• 14

• 16

Tags

CCSS.8.EE.C.8C

An has 23 classmates. In An's class, at least how many students' birthdays are in the same month?

Hannah used some pins to make a triangle. There were 9 coins on each side of the triangle and one coin at every corner. How many coins were used to make the triangle?

Tags

CCSS.3.MD.D.8

Five years ago, John's age was half of the age he will be in 8 years. How old is he?

Answer explanation

Tags

CCSS.8.EE.C.7B

How many ways can Jane go from A to B, knowing that she only choose the shortest ways?

There are 3 boxes, exactly one of which has a car. On each box there is a statement, knowing that only one of which is true: 1. Box 1: The car is in this box; 2. Box 2: The car is not in this box; 3. Box 3: The car is not in box 1. Which box has the car?

• 1

• 2

• 3

Answer explanation

If box 1 has the car: 1-T, 2-T, 3-L => FALSE

If box 2 has the car: 1-L, 2-L, 3-T => TRUE (there is only one true statement)

If box 3 has the car: 1-L, 2-T, 3-T => FALSE

66 students are either wearing XL, L, M, S or XS size uniforms. Then number of students

wearing M size is the greatest among all sizes. At least how many student(s) is / are

wearing the M size?

• 13

• 14

• 15

• 16

Tags

CCSS.6.EE.B.8

There are 4 green socks, 8 red socks and 10 blue socks. If you are blindfolded, how many sock must you draw to make sure that there is 1 pair of green socks, 1 pair of blue socks?

• 14

• 16

• 18

• 20