Le Monde puzzle [#1045]
An minor arithmetic Le Monde mathematical puzzle:
Take a sequence of 16 integers with 4 digits each, separated by 2, such that it contains a perfect square and its sum is a perfect cube. What are the possible squares and cubes?
The question is dead easy to code in R
for (x in as.integer(1e3:(1e4-16))){ if (max(round(sqrt(x+2*(0:15)))^2==x+2*(0:15))==1) { b=sqrt((x+2*(0:15))[round(sqrt(x+2*(0:15)))^2==x+2*(0:15)]) if ((round((2*x+30)^(1/3)))^3==(2*x+30)) print(c(x,b,(16*(x+15))^(1/3)))}}
and return the following solutions:
[1] 1357 37 28 [1] 5309 73 44
Nothing that exciting…!
Leave a Reply