you divide my number by 2,3,4,5 or 6, you will find there is always
a remainder of 1. But if you divide it by 11, there is no remainder.
My number is less than 200. What's my number?
hundred twenty (720) is a remarkable number. It can be divided evenly
by many numbers (1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24,
30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, and 720).
There are 30 different numbers in all. Can you find an even more remarkable
number, less than 1,000?
grocer bought 15 dozen oranges at $0.99 a dozen. He found 15 bad
oranges in the box. He sold the rest of the oranges in sacks of
is the least amount that three oranges can sell for in order for
the grocer to break even?
much must three oranges sell for in order for the grocer to make
an $11.00 profit?
the following decimals into a 3 by 3 grid like the one below to
get a sum of 3 along the horizontal, vertical and diagonal axis:
0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8
pattern do you notice?
travelers are leaving Houston for Austin on the same day. One is
traveling by car, one by train, and one by air. The round trip by
car takes 300 minutes. The round trip by train takes 360 minutes.
The round trip by air takes 70 minutes. How much time will elapse
before all three passengers will leave Houston again at the same
continuous round-trip activities for all three travelers.
a game of chance Susan doubled her money and then spent $5.00. In
a second game of chance she tripled her money and then spent $15.00.
she had $12.00 left how much money did Susan start with?
are the missing numbers in this arrangement?
the following fractions into the 3 by 3 grid to yield a sum of 3
3/4 along the horizontal, vertical, and diagonal axis:
1/2, 3/4, 1, 1 1/4, 1 1/2, 1 3/4, 2, 2 1/4
pattern do you notice?
in the year 1849, people born in 1806 were able to make an unusual
mathematical boast. This unusual boast could also have been made by
people in 1936 by people born in 1892. In 2025, this ususal mathematical
boast can be made by individuals who were born in 1980. Given that
a person was born in the 21st century, in what year will that person
be able to make this unusual mathematical boast?
Oscar, Jose, Charles, and Joel are making remarks about their own
and each others bank account balances.
has more than Marcus
Charles has $30 less than Jose
made by anyone whose balance is $500 or over are true, unless his
account balance is perfect square. Remarks made by anyone whose
balance is under $500 are flase, unless hiss account balance is
a perfect cube. Find all their account balances.
1. Square of 11
1. A perfect cube
6. Sum of digits
2. An odd number
7. A prime number
3. A prime number
8.Odd, but not prime
4. Its square equal
9. This number is
larger when reversed; the sum its digits is 7
5. The cube of a
10. Square of product
of two primes
7. When reversed
this is the square of a prime number
12. A perfect cube
9. A perfect cube
11. A prime number
has a crate of 256 apples. he sold 25% of them to Marci. Next he sold
25% of those remaining to George. Next he sold 25% of those to George.
Next he sold 25% of those to Carla. Then he sold 25% of those remaining
to Joy. Since 25% + 25% + 25% + 25% = 100%, does this mean that john
sold all of his apples?