What was the man buying at the hardware store?
Answer: house number digits. Each one costs 50 cents. (so any 3 digit number costs $1.50).
How to put 10 objects in 5 rows of 4 each?
Draw a 5 pointed star and put an object at the intersections of lines. Now that wasn’t hard, was it?
A Bit Harder for this month: Find a 4 digit number that when multiplied by 4 is another 4 digit number with digits in reverse order of the first number. (abcd x 4 = dcba) Now do it for a 5 digit number. Only logic and time are required.