Daily 30 Seconds 

Can you solve the mathematical questions in 30 seconds?

go to the answer box when 'start' is selected [save]

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Easy – Apr 25

Puzzle Copyright © Kevin Stone

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Medium – Apr 25

Puzzle Copyright © Kevin Stone

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Hard – Apr 25

Puzzle Copyright © Kevin Stone

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Click 'start' to see the starting number, and then follow the instructions, one at a time, until you reach the end. Not everyone can solve every 30 Seconds puzzle within 30 seconds.

• HALVE   divide by 2 (e.g. 10 ÷ 2 = 5)
• DOUBLE  multiply by 2 (e.g. 10 x 2 = 20)
• SQUARE  times by itself (e.g. 10 x 10 = 100)
• CUBE    times by itself twice (e.g. 10 x 10 x 10 = 1,000)
• x³/₅    find three fifths (e.g. ¹/₅ of 15 = 3, so ³/₅ = 9)
• x2¹/₃   find two and a third (e.g. 2 ¹/₃ of 15 = 2 x 15 + 5 = 35)
• x10%    find 10% (e.g. 10% of 80 = 8)
• √       find the square root (e.g. the square root of 100 is 10)

I have deliberately chosen not include the answers – you can use a calculator to see the value at each stage of the calculation.

Note: take a look at the information about the difficulty levels.

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