Follow these steps
(a) take any number
(b)multiply it by 2
(c)add 8 to the total you have
(d)divide the total you have by 2
(e)subtract the first number you took in step(a) from the total
(f) isn't the answer =4
QUESTION: how did i come to know the answer?
2006-07-19 21:32:50 · 12 answers · asked by Omar 1 in Science & Mathematics ➔ Mathematics
old trick buddy
2006-07-19 21:36:33 · answer #1 · answered by WOLVERINE 4 · 1⤊ 0⤋
Let the number be: X
step (a) take the number X
step (b) multiply it by two 2X
step (c) add eight 2X + 8
step (d) devide the total by two (2X + 8)/2 = X + 4
step (e) subtract the original number (X + 4) - X = 4
Does that answer ur question?????????????
2006-07-20 05:24:21 · answer #2 · answered by katch_kapil 1 · 0⤊ 0⤋
Suppose the Number is X
so the formula could be..
(2X+8)/2 - x = n
X + 4 -X = n
n = 4
For every X Ð R
2006-07-20 07:22:39 · answer #3 · answered by M. Abuhelwa 5 · 0⤊ 0⤋
Let x be the number you choose and N the number you end up with. Then following your steps, you have:
N = ((2x+8)/2) - x
2N = 2x + 8 -2x
2N = 8
N=4
That's how.
2006-07-20 04:47:08 · answer #4 · answered by Jimbo 5 · 0⤊ 0⤋
(a) N
(b) 2N
(c) 2N + 8
(d) ( 2N + 8 ) ÷ 2 = N + 4
(e) ( N + 4 ) - N = 4
(f) 4
You came to know the answer because the answer is the same regardless of which number you start off with.
2006-07-20 06:05:09 · answer #5 · answered by Anonymous · 0⤊ 0⤋
because what you are really doing is dividing 8 by 2. the rest of the equation cancels itself out
2006-07-20 04:35:37 · answer #6 · answered by Anonymous · 0⤊ 0⤋
because u r using all the multiples of 2.
2006-07-20 06:10:27 · answer #7 · answered by pratsi 1 · 0⤊ 0⤋
(2x+8)/2-x = y
(2x +8 -2x) / 2 = y
8 / 2 = y = 4
therefore y always equals y...doesnt matter what y is
2006-07-20 07:20:56 · answer #8 · answered by anguimorph87 1 · 0⤊ 0⤋
(2x+8)/2-x=4
2006-07-20 04:45:45 · answer #9 · answered by Santras 3 · 0⤊ 0⤋
think of some decent trick. or better still copy a decent trick
2006-07-20 06:17:17 · answer #10 · answered by williamair1 2 · 0⤊ 0⤋