Puzzle 17
Which of the shapes are identical to the first one?
Puzzle Copyright © Robert A. Hartmann
workings
hint
answer
print
www.brainbashers.com
/puzzle/zdyr
share
Hint
Try to rotate them around in your head, but watch out for mirror images.
Puzzle 18
During a recent trip to Scotland, I filled my car's 10 gallon fuel tank to the very top.
I travelled at 60 mph up the motorway, and I knew that I averaged exactly 40 miles per gallon.
However, the moment I started, my fuel tank developed a leak, and four hours later I came to a complete stop as I'd run out of fuel!
How much fuel did I lose through the leak?
Puzzle Copyright © Kevin Stone
workings
hint
answer
print
www.brainbashers.com
/puzzle/znfv
share
Hint
How far did I travel, and how much fuel did this use?
Answer
I had lost 4 gallons of fuel.
Reasoning
I travelled at 60mph for 4 hours, which is 240 miles.
At 40 miles per gallon this used 6 gallons, which meant the remaining 4 gallons were lost.
Puzzle 19
We can add a letter to each of these words, and then rearrange to make a new 5-letter word.
For example: DENY + B = BENDY (not part of the answer!).
If the 7 added letters are an anagram of CHEMIST, what are the new words?
deny
mail
exit
gosh
city
newt
type
Puzzle Copyright © Kevin Stone
workings
hint
answers
print
www.brainbashers.com
/puzzle/zquh
share
Answers
deny + e = ne edy
mail + c = c laim
exit + s = exis t
gosh + t = ghost
city + h = itch y
newt + i = twi ne
type + m = em pty
The letters ECSTHIM are an anagram of CHEMIST.
Puzzle 20
Exactly how many minutes is it before eight o'clock if …
… 40 minutes ago, it was three times as many minutes past four o'clock?
Puzzle Copyright © Kevin Stone
workings
hint
answer
print
www.brainbashers.com
/puzzle/zoic
share
Hint
How many minutes are between the times?
Answer
50 minutes.
Reasoning
If we call the number of unknown minutes T.
Between four o'clock and eight o'clock, there are 240 minutes.
There is some point between these two times, before which we have 3 lots of T, and after which we have one lot of T plus 40 minutes.
Therefore, in the 240 minutes, there are 4 lots of T plus 40 minutes.
240 = 4 x T + 40.
Therefore, T = 50 minutes.
next >