ข้อสอบGED MATHEMATICAL REASONING [Calculator] ชุดที่ 4
จำนวนผู้เข้าชม: 31
#1. What is the median of these numbers? 4, 9, 13, 8, 15, 18, 5
จำนวนผู้เข้าชม: 0
Write the numbers in order:
4, 5, 8, 9, 13, 15, 18
Since we have 7 numbers (7 is odd), then the median is the number in the middle, which is 9.
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#2. The radius of a cylinder is 8 inches and its height is 12 inches. What is the surface area of the cylinder in square inches? Write your answer in the box below. (π equals 3.14)
จำนวนผู้เข้าชม: 0
Surface Area of a cylinder = 2πr (r h),
The radius of the cylinder is 8 inches and its height is 12 inches. π is about 3.14. Then:
Surface Area of a cylinder = 2 (π) (8) (8 12) = 320 π = 1004.8
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#3. The price of a sofa is decreased by 25% to $420. What was its original price?
จำนวนผู้เข้าชม: 0
Let 𝑥 be the original price.
If the price of the sofa is decreased by 25% to $420, then: 75 % 𝑜𝑓 𝑥 = 420 ⇒ 0.75𝑥 = 420 ⇒ 𝑥 = 420 ÷ 0.75 = 560
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#4. Which graph corresponds to the following inequalities?
y ≤ x+4
2x + y ≤ -4
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#5. A bank is offering 4.5% simple interest on a savings account. If you deposit $8,000, how much interest will you earn in five years?
จำนวนผู้เข้าชม: 0
Use simple interest formula:
𝐼 = 𝑝𝑟𝑡
(I = interest, p = principal, r = rate, t = time)
𝐼 = (8000)(0.045)(5) = 1800
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