Recent Top 10
Complete the fifth circle with the correct dots.
[Ref: ZDMN] © Kevin Stone
Hint: At each stage a new dot appears at the top.
At each stage, a new dot starts at the top, and then goes either clockwise, or counter-clockwise.
Each of the following sets of letters can be made into a real word by adding three letters to the beginning, and the same three letters in the same order to the end.
For example, ANGLEM can have ENT added at the start and the end to become ENT + ANGLEM + ENT = ENTANGLEMENT.
[Ref: ZTVA] © Elliott Line This puzzle appeared in Mensa's EnigmaSig (203.08) and is used with permission.
Hint: MIC + ROCOS + MIC = MICROCOSMIC
ENT + ERTAINM + ENT = ENTERTAINMENT
RED + ISCOVE + RED = REDISCOVERED
ING + ROW + ING = INGROWING
ANT + IOXID + ANT = ANTIOXIDANT
MIC + ROCOS + MIC = MICROCOSMIC
What is represented by this BrainBat?
P U R P O S E S
[Ref: ZZPV] © Kevin Stone
Answer: Crossed purposes or dual purposes.
Using the BrainTracker grid below, how many words can you find? Each word must contain the central
P and no letter can be used twice, however, the letters do not have to be connected. Proper nouns are not allowed, however, plurals are. Can you find the nine letter word?
Excellent: 25 words. Good: 18 words. Average: 13 words.
[Ref: ZSWU] © Kevin Stone
Hint: Every word must contain the central letter.
peer, pen, pent, per, pert, pest, pester, pet, peter, preen, preener, present, preset, pretense, repent, repenter, REPRESENT, seep, serpent, spent, spree, steep, steepen, steeper, step.
epee, epees, neep, neeps, pe, peen, peens, peer, peers, pen, penes, pens, pensee, penster, pent, per, pert, perter, pes, pest, pester, pesterer, pet, peter, peters, pets, pree, preen, preener, preeners, preens, prees, prese, present, PRESENTER, preset, prest, prester, pretense, rep, repent, repenter, REPENTERS, repents, REPRESENT, reps, seep, sept, serpent, speer, spent, spree, sprent, steep, steepen, steeper, step, strep, tepee, tepees, terpene, terpenes.
A rope swing hangs vertically down so that the end is 12 inches from the ground, and 48 inches from the tree.
If the swing is pulled across so that it touches the tree, it is 20 inches from the ground.
How long is the rope?
[Ref: ZYJB] © Elliott Line This puzzle appeared in Mensa's EnigmaSig (198.24) and is used with permission.
Hint: You might find Pythagoras' theorem very useful [a 2 + b 2 = c 2].
We can use Pythagoras' theorem if we draw an imaginary line across to create a right-angled triangle.
The hypotenuse is equal to the rope's length R. The bottom of the triangle is 48 inches. The vertical side is R - 8 (the difference between 20 inches and 12 inches).
Pythagoras' theorem tells us that:
a 2 + b 2 = c 2
Where c is the hypotenuse.
This gives us:
48 2 + (R - 8) 2 = R 2
2304 + (R - 8)(R - 8) = R 2
2304 + R 2 - 16R + 64 = R 2
2304 - 16R + 64 = 0
16R = 2368
R = 148
As required. QED.
The BrainBashers safe has a rather unusual control panel. In order to open the safe you have to
press every single button once only, in the correct sequence, ending on the button marked E.
Each button clearly states which button to press next, for example, 2U means move up 2 buttons and 3R means move right 3 buttons.
Can you determine which button you must start with?
[Ref: ZCBS] © Kevin Stone
Hint: Start anywhere and see which squares are missing.
Answer: Start from the 2R on the sixth row down and second column across.
What is represented by this BrainBat?
[Ref: ZSDS] © Kevin Stone
Concave [C on CAVE]
Undersea Cave [under C CAVE].
Can you complete these 5-letter words?
[Ref: ZCIV] © Kevin Stone
Hint: One of words begins with the letter S.
.S.G. >> USAGE
..R.F >> SERIF
.ZU.. >> AZURE
E..X. >> EPOXY
.P..C >> OPTIC
..LN. >> KILNS
.W..M >> SWARM
...JO >> BANJO
Q...A >> QUOTA
.V.K. >> EVOKE
I..H. >> ITCHY
.B.Y. >> OBEYS
..DT. >> WIDTH
These words can all have a letter added and then be rearranged to make a new 5-letter word, e.g. noun union NOUN + I = UNION.
The 7 added letters are an anagram of a 7-letter word. What is the 7-letter word, and what are the new words?
[Ref: ZQUH] © Kevin Stone
MAIL + C =
EXIT + S = EXI ST
GOSH + T = GHOS T
CITY + H = ITC HY
NEWT + I = TW INE
DENY + E = N EEDY
MINI + M = MINI M
And the letters CSTHIEM spell CHEMIST.
Can you find the sum of the second column?
[Ref: ZNWN] © Kevin Stone
You don't have to find the value of every symbol. The rows add up to 80, and this will be the sum of every symbol in the grid. 23 + 18 + 24 + 15 = 80.
Therefore the columns must also add to 80, making the missing column 14. 24 + 14 + 17 + 25 = 80.
@ = 7, & = 4, $ = 8, # = 3, £ = 5.