Today’s post is for a friend named Sarah, who turned 48 yesterday. Your first fun puzzle is to figure out what is special about the italicized part in the following:
Yes, Friday afternoon! Mary has Art. Yay! One of my friends, Sarah,
can enjoy this puzzle with you, as well as the Maths and Chess brainteasers given below. Answers will be published at the time of the next post.
In celebration of Sarah’s Happy Birthday, your Maths challenge is to find positive whole numbers H and B for which 1 + H + B + H x B = 48.
We’ll say that H is greater than B. Then there are exactly four different solutions for H & B. Have fun finding all of them!
That’s quite fitting, because 48 is the largest positive whole number which equals four times the sum of its own digits.
Now it’s time for a wee dose of chess…
White (to move) has an invisible knight somewhere on the f-file.
Your chess challenge is to determine the optimal square for the invisible knight so that after you place it on the f-file, White can then force checkmate as quickly as possible.
Wishing you a wonderful weekend now,