DAY 136
Using only addition, make five 1's equal 14.

Answer:

1 +1 + 1 +11 = 14

DAY 137
How many trees would have to be planted on a street 40 yards long if there was a tree every ten yards on both sides of street?

Answer:

10 trees.........5 on each side

DAY 138
The Miller's Toll by Henry E. Dudeney: A miller was accustomed to take as toll 1/10 of the flour that he ground for his customers. How much did he grind for a man who had just one bushel left after the toll had been taken?

Answer:

1 1/9 bushels..........X - 1/10X = 1