nick1816 wrote:
Mr. White is an approximately forty years old father with 4 sons of distinct ages. Writing his age 3 times in succession, we get a 6-digit number that is equal to the product of his age, his wife's age and his 4 sons' ages. What is the sum of his wife's age and all 4 sons' ages?
A. 25
B. 30
C. 41
D. 51
E. 61
Given:
1. Mr. White is an approximately forty years old father with 4 sons of distinct ages.
2. Writing his age 3 times in succession, we get a 6-digit number that is equal to the product of his age, his wife's age and his 4 sons' ages.
Asked: What is the sum of his wife's age and all 4 sons' ages?
Let the age of Mr White be m, his wife be w, his sons ages be s1, s2, s3 & s4.
s1, s2, s3 & s4 are distinct positive integers
Let m be written as xy, where x is 3 or 4
xyxyxy = xy * w * s1*s2*s3*s4
10101(xy) = xy * w * s1*s2*s3*s4
10101 = w*s1*s2*s3*s4
10101 = 37*13*7*3*1
Sum of his wife's age and all 4 sons' ages = 37 + 13 + 7 + 3 + 1 = 61
IMO E
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Kinshook Chaturvedi
Email: kinshook.chaturvedi@gmail.com