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Daily 30 Seconds - Fri - 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.

+17

÷7

SQUARE

+2

÷3

 

−1

×7

−10

HALVE

?

Copyright © Kevin Stone


Daily 30 Seconds - Fri - Medium

HALVE

SQUARE

−10

DOUBLE

+2

 

5/8

÷2

+7

1/2

?

Copyright © Kevin Stone


Daily 30 Seconds - Fri - Hard

−3

x 31/2

HALVE

CUBE

 

+2

÷5

−4

÷13

?

Copyright © Kevin Stone


Notes

All daily items change at midnight GMT (it is roughly 7:37 AM GMT). Change.

  • 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)

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

 



 

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