The greatest integer lying between -10 and -15 is
For negative integers, the number closest to '0' on the number line has the greatest value.
The integers lying between -10 and -15 are -11,-12,-13 and -14.
Among -11,-12,-13 and -14, -11 is closest to zero on the number line.
Hence -11 is the greatest integer lying between -10 and -15.