The number 9.

Single Cell

The number 9?? emmm...ask anyone... if they were to count from 0 to 100 how many times would they come across the number 9!!!

Probability that they tell you the correct answer??... about 200:1.

silverside

20?

i dont see where the difficult is ...

Single Cell

Silverside

---

It' not supposed to be difficult,

add the following in you head and write down your answer.



1000+
10+
1000+
20+
1000+
30+
1000+
40

---

breadmonkey

I thought I was so clever counting 99 as two for a grand total of 11! My brain is dying.

Tar.Aldarion

1000+ 
  10+ 
1000+ 
  20+ 
1000+ 
  30+ 
1000+ 
  40 
_____
4100

hmm+

Bam Bam

Saw that sum on brainiac

Tar.Aldarion

Bam Bam wrote:

Saw that sum on brainiac

eh, what's the trick or whatever?

Bam Bam

You are shown one number after the other quickly and when you count it in your head you end up with 5000 and not 4100.

RefulgentGnomon

I have been asked both of these on the spot and got both right.
Posting in the Mathematics forum probably wasn't a great idea either.:v:

Single Cell

RefugentGnomon..... Maybe this one is better for you!... I was given this a couple of yrs ago. It's good!,

With the numbers 1, 4, 5 and 6 you must make 24, using the following rules:

1. Each number must be used exactly once.

2. The allowed operations are: addition, substraction, multiplication and division.

3. Numbers may not be concatenated (so, for example, it is not allowed to use 1 and 4 as 14).

4. Brackets are allowed.


There are two possible answers!.

w66w66

4/5= 1.25
1.25-1= .25
.25/6= 24

Single Cell

w66w66

4/5= 1.25
1.25-1= .25
.25/6= 24


4/5=0.8 and 0.25/6=24 apart for these been the wrong way round you got one solution..... !!!

any luck with the other?

w66w66

5 divided by 6=5/6
1-5/6=1/6 into 4=24

charlie_says

19 times. I hope...