SAT MATH VIDEOS
(Part - 17)

Problem 1 :

The time it takes a clock pendulum to repeat its motion is called its period. The formula above shows the relationship between T, the period of the pendulum, in seconds, and L, the length of the pendulum, in meters. Which of the following is closest to L when T is 8?

A) 14.4

B) 15.9

C) 16.3

D) 17.1

Solution :

Problem 2 :

The number of girls in a class is three more than four times the number of boys. If there is a total of 33 students in the class, how many boys are there ?

A) 6

B) 8

C) 10

D) 27

Solution :

Problem 3 :

Taylor has a bank account earning 5 percent interest compounded annually. If her initially deposit was $1,000 and she makes a withdrawal of $200 after 3 years, which of the following represents the total amount in her account after 7 years?

A) 1,000(1.05)⁷ - 200

B) 1,000(1.05)³ + 800(1.05)⁴

C) 1,000(1.05)³ - 200(1.05)⁴

D) 1,000(1.05)⁷ - 200(1.05)⁴

Solution :

Problem 4 :

Alex and Brian weigh a total of 300 pounds. Alex and James weigh a total of 280 pounds. James and Brian weigh a total of 350 pounds. How many pounds do Alex, Brian and James weigh altogether?

A) 425

B) 445

C) 450

D) 465

Solution :

Problem 5 :

Squares of side length 2 are removed from the corners of an 8 by 11 piece of paper shown above by cutting along the dashed lines. The sides of the paper are then folded up to create a rectangular box with an opn top. How many cubes of side length 1 are needed to completely fill this box?

Solution :