Mental Nuts-- Can You Crack 'em?
 

Mental Nuts-- Can You Crack 'em?
This is a little book of puzzles, riddles, math problems and the like published in 1921 by Waltham Watch Co.
There are 100 Mental nuts, though the first two are just nifty number tricks. Pay careful attention to what is being asked, a number of these puzzles turn on verbal assumptions.

I will put up a new mental nut every day only if the previous nut is cracked or you all cry Uncle. From time to time I will also post some of the advertisements inside the book.

Here is the first (actually #3) Mental Nut:

Doesn't matter how I arrange them ... all whole numbers are divisible by seven ... doesn't say it has to be evenly divisible.

63/1

6 - 3 - 1

Except that #6 walks on his hands which forms the number 931.

931 / 7 = 133

wait a minute....

This is an unsolvable problem.

We don't know how fast the trains are going.

Doesn't matter if they're on a treadmill.

Rhianne FTW!

Rhianne wins this round. I will keep score.

I am way too distracted by that cover design to figure out teh puzzles. It's super modern for 1921!

I thought this was a thread about me. :(


MORE MENTAL NUTS! I can never get them but it's fun trying.

Today's Mental Nut. You are only allowed to google what currency was in circulation in 1921.

$2 bills

show your work

I would like a beautiful clock catalog mailed to me, please.

The conductor has only three-cent pieces, but he has lots of them. 165 three-cent pieces make change from a $5 bill for a $0.05 fare. This hoard of coins can't make the right change for a $1 bill though.