These sums are from PETERSON's test series.
If S is a series of numbers of the form X, XX, XXX, XXXX, XXXXX, ..., where X is a non-zero digit, is every number in this series a multiple of the same prime number P?
(1) P is an odd number such that P < X
(2) X is a multiple of P
What is the solution
Y cant P be 1. And can anyone give explation ??
****************************
Does 4x + 5y = 0?
(1) y = 0
(2) 8x = -10y
Please explain . Y is the option x = 0 and y = 0 not taken into account