UKMT Maths Challenge Help
Hey guys can someone help me with this question please.
X is a positive integer in which each the digits is one; that is, X is in the form 11111...
Given every digit of the integer pX^2 + qX +r (where p,q and r are fixed integer coefficients and p>0) is also 1, irrespective of the number of digits of X, which is a possible value of q?
A. -2
B. -1
C. 0
D. 1
E. 2
The answers say E but i don't get it.
X is a positive integer in which each the digits is one; that is, X is in the form 11111...
Given every digit of the integer pX^2 + qX +r (where p,q and r are fixed integer coefficients and p>0) is also 1, irrespective of the number of digits of X, which is a possible value of q?
A. -2
B. -1
C. 0
D. 1
E. 2
The answers say E but i don't get it.
Original post by Mukunth
...
Can't give you a hint, but there is a fully worked solution here Q.25
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