There are a total of 18 triangles:

9

3 small triangles ABC ACD ADE

3 medium triangles AFG AGH AHI

3 large triangles AJK AKL ALM

also 6 more

triangles

ABD ACE

AFH AGI

AJL AKM

3 more:

ABE AFI AJM

# Category Archives: brain teaser

# March 2021 brain puzzler solution

Make three three-digit numbers that add up to as close to 1000 as possible using the digits 1- 9 only one time each.

There are multiple answers that would get 999 such as 247 + 563 + 189 or 164 + 237 + 598.

Is 1000 even possible? Here is a link to a Geogebra to help you check.

# february 2021 brain puzzler solution

The puzzles above are all about Order of Operations:

50 + 50 – 25 x 0 + 2 + 2

50 + 50 – 0 + 2 + 2

104

48 divided by 2(9 + 3)

48 divided by 2 x 12

Now go from left to right

24 x 12

288

# January 2021 brain Puzzler solution

# December 2020 Brain puzzler solution

A: 454585

9 5 5 =?

9×5 = 45 (first and second)

9×5 = 45 (first and third)

Sum of 45+45 = 90 and from this deduct center number 5 = 85