1260 Challenging Brain Teasers Page 48 of 84
Our giant collection of brain teasers will give you the opportunity to test your problem solving skills
706. Below is a sequence that is not as difficult as it first appears. Play around with it for a while and the "powers" of the mind will show you the way.
1 128 729 1024 625 216 49 ?
707. Twins named Bob and Bill ran a race. Bob ran three miles per hour uphill and six miles per hour downhill. His brother Bill ran four miles per hour both up and down. On a hill that was three miles up and three miles down, which one came in first and by how much?
708. Here is an interesting "magic square," where the rows, columns, and diagonals add up to 41. No number is used more than once and the largest number used is 26. Can you complete the square?
2 ___ ___ 26
___ ___ 5 ___
___ 1 ___ ___
9 ___ ___ 4
709. What two words, formed from different arrangements of the same six letters, can be used to complete the sentence below?
The title of the appealing little magazine defines the colorful drawings as amusing but comprehensive, in short, _________ _________.
710. Here is a sequence puzzle that is mathematical and somewhat difficult unless you unlock the secret at its root.
1 0.70711 0.57735 0.50000 0.44721 0.40825 0.37796 0.35355 0.33333 ?
711. Here's a secret code that has and interesting twist to it. (Hint: "ping pong effect")
BUCENO
BCKA
ADN
FRHTO
712. Find the number that best completes the following sequence.
3 15 6 12 9 9 12 6 15 ?
713. You may know that any number may be divided by three if the sum of the digits can be divided by three ( without a remainder, of course). You may also know that a number may be evenly divided by four when the last two digits of that number can be divided by four. Do you know the rules that apply when dividing by 6, 8, 9 and 12?
714. What two words, formed from different arrangements of the same seven letters, can be used to complete the sentence below?
A mother who ________ and spoils her child is setting up a situation in which he will be _________ by others in authority.
715. Three playing cards are placed face down on the table and someone tells you:
1. A Spade is to the right of a Heart
2. A Club is to the right of a Queen
3. One card is a King
4. An 8 is to the right of a spade
Can you figure out which card is which, from left to right?
716. James is now two-thirds Jim-s age. In three years, he will be three-fourths Jim's age. Three years ago, he was half as old as Jim. The sum of their ages is 15. How old are they now?
717. What number gives the same result when added to 2 1/2 as when it is multiplied by 2 1/2?
718. Some letters have been removed from the names of the following American states. Fill in the missing letters to find out where you are.
_ I _ H _ G _ _
_ I _ _ E _ O _ A
_ Y _ M _ N _
_ I _ _ I _ _ I _ P _
_ A _ _ A _ H _ S _ _ _ _
719. A increased by 20% = B
B decreased by 50% = C
C increased by 25% = D
D decreased by 20% = E
What percent of A is E?
720. Fill in the answers to the definitions below. (hint: for all you dog lovers, the answers all contain the word "dog".)
Decidedly opinionated __________
Persistent ___________
Creed __________
