August 2025
Problem of the Month

More Funny Math

Can you figure out this puzzle?

Solution to the Problem:

Here is the solution:

The answer is 69.

The original problem reads:
312=36
412=47
512=58
612=?

In each problem, take the first digit and multiply it by the last two digits.
Then subtract 0 from the first line, 1 from the second, 2 from the third, and finally 3 from the fourth line: 312 = 3 x 12 - 0 = 36
412 = 4 x 12 - 1 = 47
512 = 5 x 12 - 2 = 58
612 = 6 x 12 - 3 = 69

Here is another way to solve it:
Use the first number as the 10s place, then add the 3 numbers for the 1s place.
So, 312=36 would convert to 30+3+1+2=36
412=47 would convert to 40+4+1+2=47
512=58 would convert to 50+5+1+2=58
612 would convert to 60+6+1+2=69.

Correctly solved by:

1. Dr. Hari Kishan	D.N. College, Meerut, Uttar Pradesh, India
2. Colin (Yowie) Bowey	Beechworth, Victoria, Australia
3. Seth Cohen	Concord, New Hampshire, USA
4. Davit Banana	Istanbul, Turkey
5. Kamal Lohia	Hisar, Haryana, India
6. Ivy Joseph	Pune, Maharashtra, India
7. Riley Sack	Central High School, Grand Junction, Colorado, USA
8. Kelly Stubblefield	Mobile, Alabama, USA

Send any comments or questions to: David Pleacher