Finished: Math Practice Questions Air Class Minecraft and Roblox Edition

1. Selling Enchanted ​Swords (Minecraft)

Steve bought 64 diamonds at 5 emeralds each to craft enchanted swords. He sold 40 swords at a 20% profit in the first week. The remaining swords were sold at 80% of the first week’s selling price. What was his total profit in emeralds?
Steps:

64 Times 5 = 320

he then sold 240 worth of swords

then he sold 115.2 worth of swords

in total he sold

355.2 emeralds worth of sword

taking away the cost

he earned 35.2 emeralds
Answer: he earned 35.2 emeralds

2. Roblox Game Pass Discount

A Roblox game pass was marked 50% above its cost price but sold at 60% of the marked price, resulting in a loss of 150 Robux. What was the original cost price of the game pass?
Steps:

MP= 1.5C

SP= 0.6 MP

S=0.6×M=0.6×1.5C=0.9C

Loss=C−S=C−0.9C=0.1C

0.1C=150

C=1500


Answer: 1500

3. Profit/Loss on Minecraft Skins

Alex sold two rare Minecraft skins for 800 Robux each. The first skin was sold at a 15% profit, and the second at a 15% loss. Did Alex make an overall profit or loss? By how much?
Steps:

Selling Price: 800 Robux

Cost Price: 800 ÷ 0.85 ≈ 941.18 Robux

Loss: 800 – 941.18 ≈ –141.18 Robux


Answer: Alex incurred a net loss of approximately 36.83 Robux.

4. Simple Interest on Emerald Loans (Minecraft)

Maya lends 500 emeralds to a friend with a 6% simple interest rate per year.

  • (a) How much interest will she earn after 4 years?
  • (b) After how many years will the interest total 180 emeralds?
    Steps:
    Answer: A after 4 years she will earn 120
  • For question B the answer is 6 years

5. Compound Interest in Roblox

A lender offers 1,000 Robux at 10% annual interest.

  • Option 1: Simple interest.
  • Option 2: Compound interest, compounded every 12 months.
    Calculate the difference in interest earned after 2 years between the two options.
    Steps:
  • option 1 the lender will earn 200 Robux that in 2 years
  • option 2 the lender will earn
  • 100 Robux in the first year
  • and 110 Robux in the seconds year
  • so in total the lender will earn 210 Robux
  • 210 from compound - 200 from simple
  • =10

  • Answer: there is a 10 Robux difference