Solutions to Web Math Problems

  1. Yes, he will make it. At full throttle Buzzy can go 16 – 9 = 7 mph relative to shore. He has to go 21 miles for a safe landing. This means 3 hours which will require 15 gallons of gas. But he has 16 gallons.

    2.  

  2. For n people the number of handshakes is n(n – 1)/2. So if there are 15 handshakes there must be 6 people. For 78 handshakes the answer is 13.

    3.  

  3. 38 years and 133 days. Remember 1 B.C. and 1 A.D. were consecutive years.

    4.  

  4. Row 2, column 3.

     

  5. 4 brothers and 3 sisters.

     

  6. Twenty-one year old. Frank was 63 then. Now Frank is 84 and Helen is 42.

     

  7. 59 minutes.

     

  8. Nine dollars.

     

  9. There are 18 players. Each match eliminates one player. There must be 17 matches to eliminate all but the winner.

     

  10. Sunday.

     

  11. Lauren took 1 hour to drive to the coast and 2 hours coming back. So she drove 100 miles (return trip) in 3 hours with an average speed of 331/3 mph.

    12. Back to web problems

    This page has been created by Prof. Nilotpal Ghosh

    Last Update November 30, 1998