Finding Palindromes
How many four-digit palindromes exist?
Author Archive for: corrill
Entries by InterMath
Unknown Ages
If Roberto was born on his grandmother’s birthday, how old are Roberto and his grandmother now?
The Secret Pocket
How many of each kind of coin does Keith have in his secret pocket?
Products and Sums
Find a decimal number that meets certain requirements.
Remainder Shells
How many shells does Ken have in his shell collection?
Magic Square
Place the numbers in the diagram’s squares in a special way to create a magic square.
Aiming for Combinations
Annie shoots three arrows that all land inside rings of an archery target. What were her three scores?
Tallying an Election
Determine the number of votes a particular candidate could have received.
Clothes Shopping
Determine which outfit is cheaper in the long run.
Dollars and Sense
In how many ways can you make change for a dollar using certain coins?