What is the second of 5 consecutive integers if the sum of these numbers is 240?
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Nice one, I hadn't even thought of that. I divided 240 by 5 to get the mean (and thus middle) number and then took 2 away from that. I love the way brilliant lets you see all the different ways you can approach a problem.
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same here...i also divided :p
Nice solution !
NICE,I HAVE EVEN DONE THE SAME.
same as me ha
this answer can also be done like this. if we do like this - let the the middle term of this series be a and they have common difference of 1 as they are consecutive no and let this common difference be d. so, (a - 2d) + (a - d) + a + (a + d) + (a + 2d) = 240 5a = 240 a= 48 middle term is 48 and second term is 48 - 1 = 47.
How can I add my own solution? I'm new here, sorry.
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before u enter discussion,u can write a solution
That's what I did :-)
Excellent but In second line 250 may be replace with 240 :)
My answer is 48 but it is wrong ,nice solution sir
i was so confused by this solution but any way now i m ok to solve it evry where
brilliant way of solving the problem.
good
thanxxxxx
47.8 then round off so that the answer will be 48
same
lol.. i used arithmetic progression and found the third term.. 48. i guess i'm too excited and answered 46, which is wrong... :(
Lim Zi Heng .... u are right ... i also use the same method
i didn't understand that consecutive means every element increases from its previous by 1 :(
let x = first number, x + 1 = 2nd number, x + 2 = 3rd number, x + 3 = 4th number, and x + 4 = 5th number
According to the problem, the sum of these numbers is 240, therefore x + ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) = 2 4 0 By combining like terms and adding all constants, we can have 5 x + 1 0 = 2 4 0 Adding -10 both sides of the equation 5 x + 1 0 + ( − 1 0 ) = 2 4 0 + ( − 1 0 ) 5 x = 2 3 0 Divide both sides by 5 5 5 x = 5 2 3 0 x = 4 6 Therefore the second number is x + 1 = 4 6 + 1 = 4 7 .
let: x = 1st number x+1 = 2nd number x+2 = 3rd number x+3 = 4th number x+4 = 3rd number
sol'n: 240 = x + (x+1) + (x+2) + (x+3) + (x+4) 240 = 5x+10 5x = 240-10 5x = 230 x = 46
therefore:
x+1 = 46+1 = 47 2nd number is 47
x+(x+1)+(x+2)+(x+3)+(x+4)=240
5x+10=240
5x=230
x=46
So the second number is x+1=
46+1=47
let 1st number of consecutive series is x. so, sum of 5 consecutive integers is x+x+1+x+2+x+3+x+4=240. 5x+10=240. x=46. 2nd consecutive number of x is 47
let the five numbers are x,x+1,x+2,x+3,x+4,x+4 so their sum will be 5x+10=240 from this x=46 and the second number is 47
let x be the first number so the other four consecutive numbers will be(x+1) , (x+2) , (x+3) , (x+4) the equation formed will be as follows: x+(x+1)+(x+2)+(x+3)+(x+4)=540 5x=230 x=46 so the second number will be (x+1) = 46+1 =47
let x be the number x +(x+1)+(x+2)+(x+3)+(x+4)=240 5x +10=240 5x = 230 x=46 and second number is 47
Actually, it's a really simple problem. The numbers are consecutive , so, we can suppose that the first one in the sequence is "a", then:
a + (a+1) + (a+2) + (a+3) + (a+4) = 240
5a + 10 = 240
5a = 230
a = 46
But we want the second in the sequence, then we want a+1, that is 47.
let n be the 1st number, each consecutive number will be n+ 1, n + 1 +1 , and so on .Hence,
n + (n+1) + (n+2) + (n+3) + (n+4) = 240
5n + 10 = 240
5n = 230
n = 46
2nd number = n + 1 = 47
as they r consecutive numbers so,
x+(x+1)+(x+2)+(x+3)+(x+4)=240
5x+10=240
so,X=46
so,the second number is 46+1=47
We have 5 consecutive integers.Let us designate them as x,(x+1),(x+2),(x+3) and (x+4) respectively.
So : x+x+1+x+2+x+3+x+4 = 240
or 5x+10=240
or 5x=240-10=230
x=230/5=46
Hence, the second number = (x+1) = 46 + 1 = 47
five consecutive numbers 40*5 = 200, balance = 240-200 = 40, sum of 1 to 10 is 55. balance = 55-40 = 15, the first 1 to 5 gives sum value of 15. neglect. remaining 6,7,8,9,10, second one is 7.add 7 with 40 ===> 40+7 =47, The second integer is 47 ,
Let the first integer be x then 2nd=x+1, 3rd=x+2, 4th=x+3, 5th=x+4, Adding all we get, x+x+1+x+2+x+3+x+4=5x+10=240(given), or, 5x = 230, x=230/5=46 Then 2nd=47.
240/5=48 So the numbers are: 46, 47, 48, 49 and 50. Solution: 47
I would like to add: So 48 is the third number.
240/5=48 So, 48 should be the median of those 5 consecutive integers and so its 3rd one
2nd one would be 47 .
Let x be the first of the five integers. It then implies that the second, third, fourth, and fifth consecutive integers are ( x + 1 ) , ( x + 2 ) , ( x + 3 ) , and ( x + 4 ) , respectively. Then:
x + ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) = 2 4 0
5 x + 1 0 = 2 4 0
5 x = 2 3 0
x = 4 6
Since the second of the five numbers, which is ( x + 1 ) , is being asked, then x + 1 = 4 6 + 1 = 4 7 .
PS: You can change the arbitrary values of the integers, letting x be the second of the integers instead, for example. However, I did this way of solving it for the problem to be done easier (like not having to do subtraction).
let the 5 consecutive numbers be (a-2d , a-d , a , a+d , a+2d) then a-2d+a-d+a+a+d+a+2d=240 a=48 then second consecutive no. is (a-d) = (48 -1)= [47] 47 correct ans........
the avg. of 5 consecutive integers is 48.
five consecutive integers are 46,47,48,49,50.
so the 2nd integer is 47
let the first integer be x. so, five consecutive integers will be- x, x+1, x+3, x+4, x+5. then, the sum of all these integers is 250. i.e. x+x+1+x+2+x+3+x+4+x+5= 240. ie. 5x+10=240. then 5x=230. then, x=46 therefore second ineger=x +1=47
by selectin 5 consecutive terms of A.P. as : a-2d , a-d , a , a+d, a+2d ... then on adding ... 5a=240 this gives. a=48.. then 2 term from beginning=1 term preceeding our selected term... and terms are consecutive... d=1 , so ans = a-d = 48-1=47.
Let the numbers be (n-2), (n-1), n, (n+1) and (n+2) .
Then 5n = 240
Hence n = 48
But this is not the answer, since n is the third number. The answer is *n-1 = 48 - 1 = 47 *
take 5 integers as x-2,x-1,x,x+1,x+2; add up and equate to given 240 we get x and follows the answer
let x in the first no,then x + (x+1) + (x+2) + (x+3) + (x+4) = 240 => 5x +10 = 240 => 5x = 230 => x = 46 then the 2nd no wil be 47.
Let the first number be x so, According to the question x + x +1 + x + 2 + x + 3 + x + 4 =240 or, 5x + 10 = 240 or, 5x = 240 -10 or, 5x = 230 so, x = 230/5 so, x = 46 so, the second number is x + 1 = 46 + 1 = 47
let the first integer be x. now the second, third, fourth and fifth integers will be (x+1),(x+2),(x+3) and (x+4). When we add them we get 5x+10 According to question 5x+10=240. -------> x+2=48 -----> x=46 hence the second no. is x+1=47
N + (N+1) + (N+2) + (N+3) + (N+4) = 240 ,N+1 = 47
5 consicutive no are x,x+1,x+2,x+3,x+4 atq.. 5x+10=240 5(x+2)=240 x+2=48 x=46 second no is x+1 ans=47
x+(x+1)+(x+2)+(x+3)+(x+4)=240 5x+10=240 5x=230 x=46 since asked 2nd, so x+1=47
It is a multiple choice question, so that makes the question easier. You can just try each number and see which one works. The correct answer is 47, because 46+47+48+49+50=240.
Let the 5 consecutive integers be n , n + 1 , n + 2 , n + 3 , n + 4 .
The sum of the 5 consecutive integers = 5 n + 1 0 .
Then
5 n + 1 0 = 2 4 0
5 n = 2 3 0
n = 4 6 .
Hence the second of the 5 consecutive integers is 4 6 + 1 = 4 7 .
x+(x+1)+(x+2)+(x+3)+(x+4)=240
5x+10=240
5x=230
x=230/5
x=46
So, the second number is (x+1) which is simplified as (46+1)=47
take x,x+1,x+2,x+3,x+4 as the five consecutive integers which equal 240 then after adding them up we get it as 5x + 10=240 which further equals x as 46. Substitute the value of x in the second consecutive integer x+1 as 46+1=47.
Let x be the middle integer. Then the first integer is (x-2), (x-1), x, (x+1) and (x+2) Sum= 1st+2nd+3rd+4th+5th integer 240=(x-2)+(x-2)+x+(x+1)+(x+2) 240=5x 48=x
Then substitute the value of x (48-2)=46 (48-1)=47 48 (48+1)=49 (48+2)=50
therefore, the second integer is 47
our approches are alike
There are in all 5 integers. Sum of 5 integers equal to 240 Let the first consecutive number be = X Let the second consecutive number be = X + 1 Let the third consecutive number be = X + 2 Let the fourth consecutive number be = X + 3 Let the fifth consecutive number be = X + 4 Therefore equation :- (X)+(X+1)+(X+2)+(X+3)+(X+4) = 240 (5X)+(10) = 240 5X = 240-10 5X = 230 X = 230/5 X = 47
SO SECOND NUMBER = 46+1 = 47
(x) + (x+1) + (x+2) + (x+3) + (x+4) = 240 5x+ ((1+4)+(2+3)) = 240 5x + 10 = 240 5x = 230 x = 46
Second cons = x+1 Which equals 46+1 Thus, 4 7
240=5/2(2a+(5-1)1). then we get a=46. the second is 47
(2a + (N-1)d )(N/2) = 240 d = 1 N = 5 find a and 2nd term is a + 1
Assume numbers be n, n+1, n+2, n+3, n+4. As per condition given sum gives 240. i.e., n+n+1+n+2+n+3+n+4=240. We get n=46. Like this the second number is n+1 is 47.
assume those 5 consecutive numbers are n,n+1,n+2,n+3 and n+4 sum of these 5 numbers is 240......so n+n+1+n+2+n+3+n+4=240 by solving this we will get n=46 5 numbers are 46,47,48,49,50
let x, x+1, x+2, x+3 and x+4 be the 5 consecutive integers.. solving for x: 5x+10=240 5x=230 x=46 therefore the second will be 47
Let x as first number then 5 consecutive numbers will be a , a+1 , a+2 , a+3 , a+4 sum of all these = 240 so 5a + 10 = 240 5a = 230 a=46 so second no = a+1 = 46+1 = 47
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Let x be the 1st of the 5 consecutive number.
x + ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) = 2 5 0
5 x + 1 0 = 2 4 0
5 x = 2 3 0
x = 4 6
But the answer is not 46, because the question had stated that the answer is second of the 5 consecutive number
So,
4 6 + 1 = 4 7
The answer is 4 7