Daily 30 Seconds

Random: Easy Medium Hard warn when leaving unfinished puzzle [save]

Can you solve the mathematical questions in 30 seconds?

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

Easy – May 20

start

−1

SQUARE

−11

×4

−14

HALVE

÷2

−5

Medium – May 20

start

DOUBLE

−14

HALVE

×²/₅

÷4

SQUARE

−7

÷9

Hard – May 20

start

+49

×70%

−17

HALVE

÷8

SQUARE

÷10

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Notes

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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