Aptitude - Problems on Numbers - Discussion
Discussion Forum : Problems on Numbers - General Questions (Q.No. 2)
2.
Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:
Answer: Option
Explanation:
Let the three integers be x, x + 2 and x + 4.
Then, 3x = 2(x + 4) + 3 x = 11.
Third integer = x + 4 = 15.
Video Explanation: https://youtu.be/_77C9YE321Y
Discussion:
75 comments Page 4 of 8.
Gayathri Ganesan said:
10 years ago
I got idea about this solution. But if we assume the solution by question as,
3 times the x of three consecutive integers whether is my assumption also possible na.
3(x+X+2+x+4) = 3+2(x+4) // I consider it for first 3 con int respectively.
Anyone can explain my logic please.
3 times the x of three consecutive integers whether is my assumption also possible na.
3(x+X+2+x+4) = 3+2(x+4) // I consider it for first 3 con int respectively.
Anyone can explain my logic please.
Sony said:
10 years ago
At first three number is x, x+2, x+4 these are three consecutive number.
Then according to question (three times the first of three consecutive odd number) here is our first number is x then,
Our first condition will be 3x----- (1).
And then 3 more than twice the third (there third is x+4).
3 more means 3+, twice means 2.
Then twice of third is 2(x+4).
Then again 3+2(2x+4) -------- (2).
Then from equation first and second we get:
3x = 3+2(x+4).
3x = 3+(2x+8).
3x = 3+2x+8.
3x-2x = 11.
x = 11.
Then our third integer is x+4 ==> 11+4 = 15.
Our third integer is (x+4) = 15.
Then according to question (three times the first of three consecutive odd number) here is our first number is x then,
Our first condition will be 3x----- (1).
And then 3 more than twice the third (there third is x+4).
3 more means 3+, twice means 2.
Then twice of third is 2(x+4).
Then again 3+2(2x+4) -------- (2).
Then from equation first and second we get:
3x = 3+2(x+4).
3x = 3+(2x+8).
3x = 3+2x+8.
3x-2x = 11.
x = 11.
Then our third integer is x+4 ==> 11+4 = 15.
Our third integer is (x+4) = 15.
HYNDAVI said:
1 decade ago
But whats the reason to multiply 3 on both sides?
Aandrew said:
1 decade ago
Can any one say how to solve this in 32 seconds?
Reshma said:
1 decade ago
If you take x+1 as first odd no. Then put 1 in the place of x, it becomes 1+1=2 its not odd integer you got it.
Gayathri said:
1 decade ago
Three consecutive odd numbers x+1, x+3, x+5.
(x+1)+(x+3)+(x+5) = 3+2(x+5).
x = 4. So the third integer x+5 = 4+5 = 9.
I think the answer will be 9 because in this problem three consecutive odd numbers is asked then, how can we start with 0 is my doubt.
(x+1)+(x+3)+(x+5) = 3+2(x+5).
x = 4. So the third integer x+5 = 4+5 = 9.
I think the answer will be 9 because in this problem three consecutive odd numbers is asked then, how can we start with 0 is my doubt.
HEMANTH REDDY G said:
1 decade ago
3 times of 1st consecutive means 3x.
Twice of 3rd consecutive 2(x+4).
3 more than twice of 3rd consecutive 2(x+4)+3, then.
3x = 2(x+4)+3.
3x-2x = 8+3.
x = 11.
3rd integer is x+4 = 11+4 = 15.
Twice of 3rd consecutive 2(x+4).
3 more than twice of 3rd consecutive 2(x+4)+3, then.
3x = 2(x+4)+3.
3x-2x = 8+3.
x = 11.
3rd integer is x+4 = 11+4 = 15.
Neeraj upadhyay said:
1 decade ago
Three consecutive integer are 2x+1, 2x+3, 2x+5.
Now according to question.
3(2x+1) = 2(2x+5)+3.
6x+3 = 4x+10+3.
2x = 10.
x = 5.
And now third number is 2x+5 = 2*5+5 = 15.
15 is a answer.
Now according to question.
3(2x+1) = 2(2x+5)+3.
6x+3 = 4x+10+3.
2x = 10.
x = 5.
And now third number is 2x+5 = 2*5+5 = 15.
15 is a answer.
Ssgm said:
1 decade ago
An integer n any odd will be (2n+1).
After (2n+1) is (2n+3) then (2n+5).
From the Q:
3(2n+1) > 2(2n+5).
=> n > 3.5 => n start from 4 to infinity.
So the numbers (2(4)+1=9), 11, 13 and I say the answer is 13.
After (2n+1) is (2n+3) then (2n+5).
From the Q:
3(2n+1) > 2(2n+5).
=> n > 3.5 => n start from 4 to infinity.
So the numbers (2(4)+1=9), 11, 13 and I say the answer is 13.
V.Ranjitha said:
1 decade ago
Hi friends,
I think Govind is correct. Because the x value may be odd number or even number.(2x+1,2x+3,2x+5)
If x=0,
We get 1, 3, 5.
If x=1(odd),
We get 3, 5, 7.
If x=2(even),
We get 5, 7, 9.
I think Govind is correct. Because the x value may be odd number or even number.(2x+1,2x+3,2x+5)
If x=0,
We get 1, 3, 5.
If x=1(odd),
We get 3, 5, 7.
If x=2(even),
We get 5, 7, 9.
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