SAT Maths Practice Questions (1-5)
1. If 3x−7=11, what is the value of x?
A) 4
B) 5
C) 6
D) 7
Answer: C) 6
Explanation: To find the value of xxx, solve the equation: 3x−7=11
3x=11+7
3x = 18
x=18/3x
x=6
2. The expression 4×2−94x^2 – 94×2−9 factors into which of the following?
A) (2x−3)(2x+3)
B) (4x−9)(x+1)
C) (2×2−3)(2×2+3)
D) (4x−3)(x+3)
Answer: A) (2x−3)(2x+3)
Explanation: The expression 4×2−9 is a difference of squares, which factors as: a2−b2=(a−b)(a+b), Here, a=2x and b=3, so: 4×2−9=(2x−3)(2x+3)
Question 3:
If y=1/x and x≠0, what is the value of y when x=2?
A) 0.5
B) 1
C) 2
D) 4
Answer: A) 0.5
Explanation: Substitute x=2 into the equation y=1/x , y=1/2, y=0.5
Question 4:
The perimeter of a square is 40 cm. What is the area of the square?
- A) 100 cm²
- B) 120 cm²
- C) 160 cm²
- D) 200 cm²
Answer: A) 100 cm²
Explanation: The perimeter of a square is given by 4×side length. If the perimeter is 40 cm: 4×side length=40, side length=10 cm Area of a square is side length2 102=100 cm2
Question 5:
Julia saves ddd dollars each week. How much money will she save in 333 months?
- A) 12d
- B) 13d
- C) 36d
- D) 48d
Answer: A) 12d
Explanation: There are approximately 4 weeks in a month. In 3 months: 4×3=12 weeks, If Julia saves ddd dollars each week, in 12 weeks: 12×d=12d Hence, she will save 12d dollars.
Practice More:
Digital SAT Free Mock Practice Test-5| Sample Mock Paper for SAT Exam 2024
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