Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - General Questions (Q.No. 11)
11.
The present ages of three persons in proportions 4 : 7 : 9. Eight years ago, the sum of their ages was 56. Find their present ages (in years).
Answer: Option
Explanation:
Let their present ages be 4x, 7x and 9x years respectively.
Then, (4x - 8) + (7x - 8) + (9x - 8) = 56
20x = 80
x = 4.
Their present ages are 4x = 16 years, 7x = 28 years and 9x = 36 years respectively.
Discussion:
41 comments Page 3 of 5.
Vijay Anand said:
1 decade ago
@Anu.
AGO means(-).
SINCE, AFTER means(+).
AGO means(-).
SINCE, AFTER means(+).
Sam said:
1 decade ago
Search for the common multiplier.
Here 4 matches exactly i.e.,
4*4 = 16.
4*7 = 28.
4*9 = 36.
Here 4 matches exactly i.e.,
4*4 = 16.
4*7 = 28.
4*9 = 36.
(1)
Naveen kumar said:
1 decade ago
x(4+7+9) = 56+8+8+8.
Then we got x = 4.
For further answer each x term multiplied by 4.
Then we got x = 4.
For further answer each x term multiplied by 4.
Vinutha said:
1 decade ago
Simple method:
4*4 = 16.
7*4 = 28.
9*4 = 36.
4*4 = 16.
7*4 = 28.
9*4 = 36.
(1)
Djdave said:
1 decade ago
f1:f2:f3 = 4:7:9.
f1 + f2 + f3 - 24 = 56.
f1 + f2 + f3 = 80.
f1 = 4 / 20 * 80 = 16.
f2 = 7/20 * 80 = 28.
f3 = 9/20 * 80 = 36.
f1 + f2 + f3 - 24 = 56.
f1 + f2 + f3 = 80.
f1 = 4 / 20 * 80 = 16.
f2 = 7/20 * 80 = 28.
f3 = 9/20 * 80 = 36.
Roshni said:
1 decade ago
It is a ratio of three values then why plus is coming?
Sanju said:
1 decade ago
4x-8+7x-8+9x-8=56 x=4 then 4x=16 is present ages.
(1)
Ravi said:
1 decade ago
Why they minuses with 8?
Yunus said:
10 years ago
It is simple that eight years ago 56 and now 3 persons*8 years each = 24 years.
So 56+24 = 80 now we check options the sum of 80 is 16+28+36 = 80 is option B answer.
So 56+24 = 80 now we check options the sum of 80 is 16+28+36 = 80 is option B answer.
Karthika.l said:
10 years ago
Please explain in easy way?
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