BrainDen.com - Brain Teasers

# marcussoori

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11

1. ## Mensa Math/Logic Problems...How to Solve?

And what is the method to solve problems like 3/20?

3. ## Mensa Math/Logic Problems...How to Solve?

Any solution for the 3rd 8/20?
4. ## Mensa Math/Logic Problems...How to Solve?

For the 2nd 8/20, is the answer 7?
5. ## Mensa Math/Logic Problems...How to Solve?

I also can't solve the 2nd 4/20
6. ## Mensa Math/Logic Problems...How to Solve?

I still can't figure out 15/20...anyone?
7. ## Mensa Math/Logic Problems...How to Solve?

For the third image, 8/20, isn't there an error on the last row of the problem? I am using the XOR method you described (add images and remove overlapping areas). Anyway, I believe the solution is the fifth option.
8. ## Mensa Math/Logic Problems...How to Solve?

For the first image, 4/20, answer is 75. For each row, add the two numbers, and then reverse the digits. If the addition results in a number over 100, add the 1 to the last digit, then reverse the resulting two digit number.
9. ## Mensa Math/Logic Problems...How to Solve?

For the second 9/20, answer is 62? Multiply 2 numbers outside of circle, subtract the multiplication of the two remaining numbers, and you have the number in the middle of the circle.
10. ## Mensa Math/Logic Problems...How to Solve?

Thanks for all the answers, esp. 11/20! I forgot that equation from high school math. I have an alternate solution for 9/20, the shapes problem. 6 3 5 4 4 \ \ / \ / / \ \ / \ / / \ \ / \ / / \ \/ \ / / \ /\ \ / / \ / \ / \ / \ / \ / \ / -1 \ +1 -1 ? ----> +1 (so 4+1 = 5) So are there multiple solutions to these problems?
11. ## Mensa Math/Logic Problems...How to Solve?

I am unable to find similar problems or solutions online, so I thought I'd ask here...I'd really appreciate it if you all could help me learn how to solve these types of problems, so please include the correct reasoning process and solution, if you don't mind. Thanks in advance!
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