[Dougal]

Spoiler

Can't see why it's a riddle, it's too easy.

Full at 2:30 and doubled every minute and a half means half full at 2: 28 and 30 seconds.

 

[RobertD]

Spoiler

2.28.30

 

[Sewgood]

Spoiler

2:28 and 30 seconds

 

[Sandy Montague]

Spoiler

2.28.30 secs - doubles every 90 secs.

 

[ChrisUren]

Spoiler

2.28 and 30 seconds

 

[KenE]

Spoiler

2.28.30pm

 

[Macman]

Spoiler

2:28:30

 

[Slapsy]

Spoiler

1428 and 30secs

 

[Topher]

Spoiler

2:28:30 p.m. - as doubling would mean it is half full just 90 seconds before!

 

[Deb]

Spoiler

2.28.30

 

[Clyde]

Spoiler

when it was half empty

 

[TrenaJ]

Spoiler

2.28mts 30seconds pm

 

[Hutch]

Spoiler

Goood Morning Riddle Masters!

Here is your final riddle of the week, it's a tough one, but I think you guys can do it! A big thanks to Suzi H for sharing this tough one with us:

DUSTBOWL DAM is usually as dry as an accountancy text book. Yesterday, it contained only 10 muddy gallons of water.
But then, a big storm broke - DOUBLING the amount of water in the dam every 90 seconds. By 2.30 pm, the dam was brimming full. At what time had it been half full?

Oooooh we are excited to see how many of you manage to crack this one? As always, a spoiler button will hide yours and others' answers, so if you want to see the answers simply click the spoiler button.

Avoiding cheating with this one though, if you can

At 2.28.30 seconds

 

[Hutch]

Spoiler

At 2.28.30 seconds

 

[Meredith]

Spoiler

2.28.30 pm

 

[Terrytooth]

Spoiler

2:28:30pm

 

[Yorkydave]

Spoiler

Goood Morning Riddle Masters!

Here is your final riddle of the week, it's a tough one, but I think you guys can do it! A big thanks to Suzi H for sharing this tough one with us:

DUSTBOWL DAM is usually as dry as an accountancy text book. Yesterday, it contained only 10 muddy gallons of water.
But then, a big storm broke - DOUBLING the amount of water in the dam every 90 seconds. By 2.30 pm, the dam was brimming full. At what time had it been half full?

Oooooh we are excited to see how many of you manage to crack this one? As always, a spoiler button will hide yours and others' answers, so if you want to see the answers simply click the spoiler button.

Avoiding cheating with this one though, if you can

 

[Yorkydave]

Spoiler

90 seconds before 2.30pm ie 2.28 and 30 seconds

 

[Gazman]

Spoiler

14:28:30

 

[Malcolm]

Spoiler

2.28.5 pm