Daft Dave, our local DIY expert, is renovating the local hospital.
He has to number each of the rooms in the hospital with plastic numbers.
However, he has run out of the number 9.
How many 9's must Dave buy in order to number all 1,000 rooms?
[Ref: ZRQK] © Kevin Stone
Hint: Don't forget the extra 9's in 90, 91, etc.
Start with: 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 - which is 20 9's.
We then repeat this for 100, 200, 300, up to 900 - which is 200 9's.
But from 900 to 999 we have an extra 100 9's as each starts with a 9.
So the total is 300.
What is represented by this BrainBat?
[Ref: ZHQZ] Copyrighted.
Answer: Split second timing.
The month of March in the year 1980 contained 5 Saturdays and 5 Mondays.
What day of the week was the 15th of March?
[Ref: ZVNZ] © Kevin Stone
Hint: What day of the week was the 1st?
For a 31 day month, such as March, to have 5 Saturdays and 5 Mondays the 1st must have been a Saturday, and the 31st a Monday.
You can then work forwards or backwards.
Using the BrainTracker grid below, how many words can you find? Each word must contain the central
G 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: 17 words. Good: 14 words. Average: 12 words.
[Ref: ZVHK] © Kevin Stone
Hint: Every word must contain the central letter.
age, bag, bagel, beagle, beg, eagle, gable, gale, gate, gave, gel, get, glee, lag, leg, tag, VEGETABLE.
ag, age, agee, aglee, aglet, bag, bagel, beagle, beg, begat, beget, belga, eagle, eaglet, egal, gab, gable, gae, gal, gale, gat, gate, gave, gavel, gee, gel, gelate, gelee, gelt, get, geta, getable, gleba, glebae, glebe, glee, gleet, lag, leg, legate, legatee, tag, teg, telega, veg, VEGETABLE, vegetal, vegete.