Question

what are two consecutive numbers add to 257

Answer 1

774

Answer 2

got that?

Answer 3

257+258+259=774

Answer 4

two consecutive numbers that add up to 257 means you have
x + (x+1) = 257

solve for x

Answer 5

Exactly, so where did 774 come from?

So you want 128 and 129

Answer 6

the trick is simple
first substract by 1 and divide by 2
then you got the first answer
then add it with 1
then you got the second answer
Tada!

Answer 7

(257-1)/2 = 128
add with 1 = 129

Answer 8

You have a number, let's call it N. Now what's the number after N? That's our consecutive number, which is just whatever N is, plus 1.

So here we have:

N and (N+1) and supposedly if you add these two numbers together you get 257. So let's just do that:

N+(N+1)=257

Now you can just do a little algebra to solve for N. I hope that explanation makes it more clear, even though it seems weird. Try plugging in a number for N before solving to see why N+1 is a consecutive number.

So for example, if you have N and N+1 then if you plug in 7 for N, you will see that you get 7 and 8.

Answer 9

thx guys helped a lot!

Answer 10

its like my 2week of year7 and wasn't sure how to do it!

Answer 11

just go 257/2 = 128.5

so the 2 numbers are the integers either side of 128.5

so the numbers are 128 and 129

Answer 12

I like that answer @campbell_st since it's clever, but unfortunately it's not as helpful if you wanted to find out what numbers you have when you have the sum of say, 5 consecutive numbers.