## Realated Questions

The number of positive integers n in the range 12 ? n ?40 such that the product (n – 1) (n –2)…3.2.1 is not divisible by n is

In a certain examination paper, there are n questions. For j = 1, 2 …n, there are 2n-j students who answered j or more questions wrongly. If the total number of wrong answe rs is 4095, then the value of n is

If 7

^{(x - y)}= 343 and 7^{(x + y)}= 16807, what is the value of x