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

You are not logged in.

## #1 2013-09-23 00:36:45

auyeungyat
Member
Registered: 2013-09-23
Posts: 22

### How it's coming?

You pick a number(3 numbers),multiply by 7,11,13,(example:123X7X11X13=123123)
How it comes?

Offline

## #2 2013-09-23 00:51:10

bob bundy
Registered: 2010-06-20
Posts: 8,232

### Re: How it's coming?

hi auyeungyat

Welcome to the forum.

I have changed the {} into [] so that your answer is hidden.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

## #3 2013-09-26 21:50:03

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: How it's coming?

3x7x11x13

21x11x13

231x13

3,003

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

## #4 2013-09-27 16:42:41

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: How it's coming?

If 1:

1x7x11x13

7x11x13

77x13

1,001 (just a third of my example above!)

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline