 Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #1 Re: Jokes » Hero Zero Limerick » 2019-12-04 19:28:37

ZERO  THE  ALMIGHTY

As we saw in the Limerick, ZERO can bring any Number, however Big to Nought, by Multiplying it.,
And also elevete any Number, however Small and Infinitesimal, to soar to the Highest Level by Dividing it

92 minus

Someone Commented "

I remarked "

Then some the Remarkable Greatness of Zero.

## #2 Jokes » Hero Zero Limerick » 2019-11-20 15:49:56

RatnaPrabhu
Replies: 1

HERO ZERO Limerick

There was a Big Show-Off Number

With Digits Too Long to Remember

(Puffed-up Self Smart Hero)

He Conjugated, Diff'rentiated  Factorized

He got us Terrorized

Until He Simply Vaporized

Multiplying Zero  !!

## #3 Re: Puzzles and Games » Puzzle of 28 » 2019-11-20 02:48:07

28 PUZZLES

By way of a little Guidance . . .  here are some Examples . . .

For the 6 Puzzles . . .     7 - (7/7) =  6

For 28 Puzzles  . . .       (2 + 2)! + 2 + 2 =  28

RatnaPrabhu

## #4 Re: This is Cool » Fast way to find primes. » 2019-11-20 02:17:05

CHIKA OFILI Test for Divisibility by 7

For Centuries All Top Mathematicians would have had a Go at finding a Test for Divisibility by 7.

Now, a 12 year old Chika Olifi has come out with a very Simple Test.

Consider your Number as AB, where B is the last Digit and A is the rest of the Digits considered as a Single Number.
Chika Ofili Test is to Calculate A + 5B. If that is Divisible by 7, then our Original Number is Divisible by 7.

For Example, . . . Consider 588 . . . A is 58 and B is 8 . . .  A + 5B is 58 + 5 * 8 = 98 . . . this being Divisible by 7, it means 588 is Divisible by 7.

This can be Proved by a few simple steps, which our Maths Fans can try out.

## #5 Re: Puzzles and Games » Magic Squares » 2019-11-19 03:32:16

Durer's Magic Square has numerous Four Number Symmetrical Sets in it adding to the Magic Sum, in addition to the usual Rows and Columns and Diagonals . . .  as for example the Corners, the Central Four, the Quadrants, and many other Four Square Combinations.

## #6 Puzzles and Games » Puzzle of 28 » 2019-11-19 03:22:09

RatnaPrabhu
Replies: 2

There is a very Popular and in fact quite a Fantastic Puzzle of Sixes like this . . .

N  N  N  =  6

Insert Mathematical Symbols and make Equality Equations for N = 0 to 9

This is quite a Beauty, and adds another Feather to the Cap of Number Six, which anyway is a Perfect Number.

This set me wondering if the next Perfect Number 28 will also have such Fantastic possibility . . .

N   N   N   N   =   28

. . .   and I have found it to be possible for 2 to 9 except 6.

Would Our Members like to crack this, for the Numbers as above and also for 0. 1 and 6 ?,