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Daily 30 Seconds - Easy

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Click 'Start' to see the number you're starting with, and then follow the instructions until you get to the end.

×4

+5

×2

+18

HALVE

 

−1

÷7

SQUARE

−3

?

 


Daily 30 Seconds - Medium

DOUBLE

+2

÷7

−1

SQUARE

 

−9

HALVE

−5

×8

?

 


Daily 30 Seconds - Hard

x 15%

x 11/3

×9

x 25%

SQUARE

 

÷3

−1

÷13

CUBE

?

 


Notes

  • 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)
  • x 3/5   find three fifths (e.g. 1/5 of 15 = 3, so 3/5 = 9)
  • x 21/3  find two and a third (e.g. 2 1/3 of 15 = 2 x 15 + 5 = 35)
  • x 10%   find 10% (e.g. 10% of 80 = 8)
  • √       find the square root (e.g. the square root of 100 is 10)

 



 

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