# Daily 30 Seconds

Random Puzzle: Easy - Medium - Hard

Can you solve the mathematical questions in 30 seconds? Click 'start' to see the starting number, and then follow the instructions until you get to the end.

−1
÷2
SQUARE
−7
÷3
−6
×4
+10
HALVE
?

−4
×3/5
DOUBLE
−8
×4
−6
HALVE
−2
×1/5
?

−2
×12/5
+32
HALVE
×30%
+3
÷11
SQUARE
×4
?

## Notes

All daily items change at midnight GMT - set your local time zone.

• 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)
• ×3/5    find three fifths (e.g. 1/5 of 15 = 3, so 3/5 = 9)
• ×21/3   find two and a third (e.g. 2 1/3 of 15 = 2 x 15 + 5 = 35)
• ×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 - but you could use a calculator to see the value at each stage of the calculation.

Note: BrainBashers has a Dark Mode setting.