[Ref: ZTBA] © Kevin Stone
Hint: The first word is THE.
Answer: The squeaking wheel gets the grease.
A large fresh water reservoir has two types of drainage system. Small pipes and large pipes.
6 large pipes, on their own, can drain the reservoir in 12 hours.
6 small pipes, on their own, can drain the reservoir in 18 hours.
How long will 6 large pipes and 6 small pipes take to drain the reservoir?
[Ref: ZNEC] © Kevin Stone
Hint: It doesn't matter how large the pipes are .
Answer: 7 hours and 12 minutes.
The exact size of the pipes and reservoir does not matter. If we label the large pipes L, the small pipes S and if the reservoir has a total of T litres, then:
T ÷ 6L = 12 which means L = T ÷ 72
T ÷ 6S = 18 which means S = T ÷ 108
we want T ÷ (6L + 6S)
= T ÷ ((6 x T ÷ 72) + (6 * T ÷ 108))
= T ÷ ((648 x T + 432 x T) ÷ 7776)
= T ÷ ((1080 x T) ÷ 7776)
= 7776 x T ÷ (1080 x T)
= 7776 ÷ 1080
= 7.2 hours
= 7 hours and 12 minutes. QED.
Can you complete this grid of letters. Each line is a valid 5 letter word with its first and last letter missing.
The missing letters form a word when read downwards and the same word appears both at the start and at the end.
What is the missing word?
[Ref: ZESK] © Kevin Stone
Hint: The missing word begins with the letter E.
Answer: The missing word is ELBOW.
What is represented by this BrainBat?
Answer: Once in a blue moon: [ONCE in 'A Blue Moon'].
Using the BrainTracker grid below, how many words can you find? Each word must contain the central
C and no letter can be used twice, however, the letters do not have to be connected. Proper nouns are not allowed, however, plurals are. There is at least one nine letter word. Excellent: 40 words. Good: 32 words. Average: 28 words.
[Ref: ZKCF] © Kevin Stone
Hint: Every word must contain the central letter.
Common words: across, arc, arcs, calm, calms, car, carol, carols, cars, clam, clams, class, CLASSROOM, coal, coals, cola, color, colors, coma, comas, coo, cool, cools, coos, coral, corals, cosmos, cram, crams, crass, cross, macro, macros, scam, scams, scar, scars, scram, scrams.
All words: across, arc, arco, arcs, calm, calms, calo, cam, cams, car, carl, carls, carol, carols, carom, caroms, cars, clam, clamor, clamors, clams, claro, claros, class, CLASSROOM, coal, coals, col, cola, colas, color, colors, cols, coma, comal, comas, coo, cool, cools, coos, cor, coral, corals, corm, corms, cos, cosmos, coss, cram, crams, crass, cross, lac, lacs, loca, loco, locos, mac, macro, macros, macs, marc, marcs, moc, mocs, oca, ocas, orc, orca, orcas, orcs, roc, rocs, sac, sacs, scam, scams, scar, scars, scram, scrams.