parallel_chase wrote:mberkowitz wrote:
if anyone believes the oa is wrong please advise.
what i dont understand, is why the number is broken down into 4^2 5 and 7, rather than 2^4 5 and 7, as that would give us a different answer.
I think OA is perfect.
3920 = 2^4 * 5 * 7^2
P^3 could be 2^6 * 5^3 * 7^3
P = 2*2*5*7 = 140
sum of digits = 1+4 = 5
If you take
P^3 = 4^3 * 5 * 7
P = 4*5*7 = 140
sum of digits = 1+4 = 5
Hope this helps.
Absolutely agree with the reasoning but question asks about the sum of the digits, not about the sum of the prime factors.
minimum p is 2^6 * 5^3 * 7^3 = 2744000
the sum of the integers is 25
it also can be 5488009, the sum of the integers is 34
This shows that either OA is incorrect or question is incorrect
