What is the next number in this series: 9, 19, 21, 32, 34, X?
The series goes up 10, down 2, then up 11, down 2, meaning the next will be up 12 - 34 + 12 = 46
When throwing 2 dice, what are the chances of getting a 12?
1/6 times 1/6 for each dice = 1/36
How many 7s there are between 1 - 100?
The King Has 5 Daughters, each one is half the age of the other. If the king met the mother of the oldest 40 years ago, what is the age of his youngest daughter?
There are a few possibilities IF there was no age cap when the oldest was born. Since she was born less than 40 years ago, then the sequence must be 2,4,8,16,32 - meaning the youngest is 2 years old.
There are 12 identical Coins. They all have the exact same weight except for 1 coin that is heavier than the other 11 coins. How many weighings, at the minimum, are required to identify this different coin?
(3 weights - 4 and 4 coins, 2 and 2, 1 and 1)
What 3 Consecutive Numbers can you Multiply to get 4080?
You Need to Get to 1000, but you can only add numbers that are all eights (8,88.. etc). How many different numbers would you need?
What's the missing number: 11x11=4, 22x22=16, 33x33=36, 55x55=X?
Use four 9s (any way you want) to get to 100 - How many different numbers would you need?
99 + (9/9) = 100
March = 538, February = 8210, July = 4711, April 549, September=?
(first digit is the number of letters, 2nd the number of the month, and third is the first two numbers combined so the answer is 9918)
142 = 0, 3271 = 0, 6211 = 1, 83461 = 3, 908763 = 5, 4789033 = ?
You count the number of circles in the numbers to get the answer.
What the missing number? 11x23=10, 35x13=32, 41x72=45, 62x51=X?
The formula here is (a+b x c+d)
Oops! You Got a Low Score...
Maybe you're not focused or maybe you haven't done math like this in a long time. It could also be you haven't let yourself enough time to really think about it. Why not try again, and if not - have a look at our explanations of your mistakes below.
You Mad, Impossible Genius!
Wow, are you a retired math teacher? These are high marks indeed! You either got full marks or only had one mistake, and that happens to us all. You are a math wiz and if you haven't used math like this since school, we're double impressed with you. You're awesome!