Tag Archives: brain teaser

March 2025 Brain Puzzler Solution

Q: What are all the possible solutions to sum of consecutive positive integers that sum to 2025?

A: There are many solutions if we take out the word “longest”.
1 number 2025
2 numbers 1012 + 1013
3 numbers 674 + 675 + 676
5 numbers 403 + 404 + 405 + 406 + 407
6 numbers 335 + 336…+ 340

9 numbers 221 + 222 + …+ 299
10 numbers 198 + 199 + 200 + … +207
15 numbers 128 + 129 + … + 142
18 numbers 104 + 105 + … + 121
25 numbers 69 + 70 + …+ 93

27 numbers 62 + 63 + … + 98
30 numbers 53 + 54 + … + 81+ 82
45 numbers 22 + 23 + …67+ 68
54 numbers 11 + 12 + ….+ 63 + 64






November 2015 Brain Teaser Solution

Which is greater, 2^1100 or 3^700?
Bonus: Approximately how many times greater is it (to the nearest 10)?
Both of these are too large to do on a calculator and will force the calculator into overflow.  So we have to come up  with another way to compare them rather than getting both actual values.
We can write them as:
(2^11)^100   and (3^7)^100 and just compare the
2^11   vs 3^7
2048 vs 2187
so 3^700 is the winner!!
Here is a link to the answer to the bonus
Thanks for solving

June 2015 Brain Teaser Solution

Q: Can you take the clock face below, and cut it into four pieces such that the numerals on each part add up to the same number?

A: The key is to turn the number XI upside down to a IX or:
turn the IX upside down to a XI
The numbers 1-12 add up to 78 which is not divisible by 4
Replace 11 with a 9 and the numbers now add up to 76 which is divisible by 4
and/or replace the 9 with an 11 and now the numbers add up to 80 which is also divisible by 4