DAY 158
What is the sum of the first 100 counting numbers?

Answer:

5,050...........This is a classic math problem. The trick is to put the numbers into pairs from 1 to 100 such that each pair adds to 101. (1+100.....2+99.....3+97............
continuing to 50+51) Thus 50 pairs of 101 each = 50 X 101 = 5,050. A simpler example of this is to add the first 10 counting numbers (1+10.....2+9..... continuing to 5+6) Five pairs of 11 each = 5 x 11 = 55.

DAY 159
A bus with no passengers on board makes its first stop and 5 people get on. At the next stop 8 people get on. At the next stop 6 people get off. How many people are now on the bus?

Answer:

8........7 plus the driver.