Ans 1: (Master Answer)
(D):
P. 8 million = 8000000
Predecessor of 8000000 = 8000000 -1 = 7999999
So, P is true.
Q. Largest 5-digit number = 99999
99999 rounded to the nearest tens = 100000
and 100000 is the smallest 6-digit number.
So, Q is true.