Last Problem:
What is next number in the following series of numbers
3, 4, 6, 9 ?
Answer:
13
The following number in the sequence is equal to the difference between the previous two numbers plus 1. So, 9-6 = 3 + 1 = 4. So, 9+4 = 13.
Today’s Mind Puzzle:
A monkey climbs 3 yards in 1 hour and slips back 2 yards. How long does it take the monkey to climb 20 yards?