Videos Test Yourself Wordcipher MathFacts Math Diagnostics Math Tricks Daily PhysEd
Class Photos Worksheets Teen Math Musiclopedia Resources Teacher Timesavers Study Guides
Find The Missing Numbers
Thanks Regina B
The last 2 digits of the answer are found by adding the numbers together.
12,  9*9*3=9321,  and 8*12*4=6424.
The digit in front of that is found by counting the number of digits, not numbers.
Example: 4*6*2 has 3 digits (6312) and 9*9*3 has 3 digits (9321) and 8*12*4 has 4 digits (6424).
The number out front is then found by finding the least common multiple, not including 1 and add them together for each one.
So 4*6*2 and 8*12*4 all have 2 as the least common multiple, (2+2+2=6 for both) so...4*6*2=6312, and 8*12*4=6424 and 3 is the least common multiple for 9*9*3 so 3+3+3=9 so...(9*9*3=9321).
Then you're done. Repeat that pattern for 20*15*5

Brain Teaser Of The Week

How Brain Teasers Help You

Stimulate your brain cells.
Improve your concentration.
Increase your fluid intelligence.
Reduce brain deterioration.

Fill in the form below.
Receive one brain teaser a week.
Enter your email here.


We take your privacy very seriously.
Your information is never sold or shared.

Try More Brain Teasers