Forum Competition - International Maths Day 2023

[Gunzen]

Why was the math book sad? Because it had so many problems!

- IGN Silver Sheen Silver

[Argo]

Good one, Gunzen.. thanks for playing and good luck!

There are two answers to this question because there are 2 things about this set of numbers that makes it rather unique ..

8549176320

What are they?

You mean other than when each digit is written out in word form, the numbers are in alphabetical order and that like every other number, no other number will be 8 Billion, 549 Million, 176 Thousand, 320.

u-s-m-r-t Too easy .. What about this one? Have fun

What 9-digit number has the following features:

It has all 9 digits from 1 to 9

It can be exactly divided by 6 and 7

Each time it is rounded (starting with units, then tens, hundreds, etc) it rounds in an alternate pattern (up, down, up, ...), until after rounding 8 times the final number is 500000000

After rounding four times the sum of the digits is 24


Bonus: what is the solution if the rounding goes down, up, down, ...

[DezNutz]

Assuming rounding changed the next digit.... 473816952

[Argo]

Assuming rounding changed the next digit.... 473816952

Stop it!! My head hurts already!! lol


[/color]


You must have the same reference page open as the comp organisers.. ??
Looking up answers is not acceptable, Dez ...
MOVIN ON NOW ....

Equation: Prove that x + y = n

where x and y are any two primes
n is ≥ 4

[Argo]

Hopefully that last one may keep Dez busy for a while ... Meanwhile all you scallies and wenches see how many of the following you can solve.. post your method and solutions to be in for the prizes!

[Henry Avery]

now i'm bad at math but i do believe the answer is seven.

[Argo]

Who would have thought this would be so easy for you and so hard for me??? Duh!!

[Argo]

now i'm bad at math but i do believe the answer is seven.

Sorry Henry... good try .. but Incorrect.. have another crack tho ..

[Henry Avery]

as i said, bad at math.

[Most Lee Harmless]

What is all this kerfuffle?

The answer is always 42.

It is known.