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30 Second Hard Maths Questions!

Answer in decimal form, if more than 4 decimal places, round to the nearest thousandth. DO NOT USE COMMAS IN NUMBERS.
When you need to put measurements, do NOT abbreviate them, for example, cm should be centimetres
Quiz by
bobloxian
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Last updated: March 18, 2025
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First submittedMarch 18, 2025
Times taken21
Average score10.0%
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Question
Answer
Q1: 2*3^5-39
447
Q2a: n=4. If
23n = 4.2y, what is y?
38.64
Q2b: 0.5y = x, what is x?
19.32
Q2c: Solve: (x-17.32)²ⁿ
256
Q3a: 3519*2
7038
Q3b: 3519*0.5
1759.5
Q4: What is 5,810 in the
Standard form? (Express
in words.)
5.81 multiplied by 10 to the power of 4.
Q5: What is 13/18 in decimal
form?
0.722
Q6: What is 392.8 quintillion in
numerals?
392800000000000000000
Q7: John is 15% taller than
Barak, he is 193.1 centimetres
tall, how tall is Barak?
222.065 centimetres
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