Sunday, January 29, 2023

## Optical illusion (and proof that you were fooled)

Light and colors can really twist how we perceive things. Looking at the picture, most of us with normal vision will see the block#1 is darker than the block#2. However, they are actually the same exact shade of gray. The dividing horizontal shading and background colors just “incorrectly” accentuates one over the other. What happens […]

## Messaging/Communication

Which messaging worked better you think in each of the following situations? And why? Carwash Punchcard: Hotel Towel Reuse:

## Can you solve this? Pattern matching

Every now and then, when my brain is bored, I come up with quizzes (around logic and code). This one’s about logic…specifically about color and order of the colored titles. Can you solve it?

## If A=2, B = 10, C=30, D=68. what is E?

Hi again, time for a break 🙂 Fun little quiz, nothing to lose your sleep over because you can solve in a minute or two if you think about it, and it’s NOT a trick question. It has a definitive answer. The problem: If A=2, B = 10, C=30, D=68. what is E? (Assuming A-Z […]

## How many thirds in a 3-quarter?

Recently Quora notified me with this question and I thought I’d do the honor of answering it first. So here’s the answer and explanation. Now, how about a different way solving it? Put another way, we can pose the problem as 1/3x = 3/4 and solve for x. If 1/3 = 0.333 (approx.) Then the […]

## Elementary Math Quiz

If (x+x+x) = x*x*x  and x <>0 (x is not zero) then what’s the value of x? I like this one a lot because x=0 would be an obvious answer and it’s taken away, and then when you plot it, you get 2 correct answers. Let’s see how it’s done… (x+x+x) = x*x*x so, 3x=x^3 […]

## Statistics can mess up your mind!

Hi again! If you like brain teasers, you’ll love this. You don’t need to be an expert in statistics and probabilities, just curious to appreciate it. Read on. What is the chance the next person you meet (in a city or country) has number of arms (or hands) that is ABOVE average? For more fun […]

## Brain Teaser: Marbles

How many marbles and bags are used in the following scenario?

## Brain teaser variation: Segment size

Determine the specific group size given the following situation. In a group of 50 kids, 30 are taking basketball and 15 are taking tennis lessons. Of the kids taking basketball or tennis, 12 are taking both lessons. How many are not taking either lesson?

## Brain teaser: Class size

Determine the total class size given the following situation.