# Daily 30 Seconds

Random: Easy  Medium  Hard

Can you solve the mathematical questions in 30 seconds?

[save]

−1
×4
+12
÷6
+11
×3
+1
HALVE
−19
?

−3
÷4
SQUARE
×1/2
+1
÷3
+4
×5/7
DOUBLE
?

+5
÷10
+1
×21/2
+6
÷9
SQUARE
HALVE
×25%
?

## Notes

Click 'start' to see the starting number, and then follow the instructions until you get to 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.

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

Note: BrainBashers has a Dark Mode setting.