## Realated Questions

Let S be a set of positive integers such that every element n of S satisfies the conditions

1. 1000 ≤ n ≤ 1200

2. every digit in n is odd

Then how many elements of S are divisible by 3?Let x=√4 + √4 - √4 + √4 - …. to infinity. Then x equals

For a positive integer n, let Pn denote the product of the digits of n, and Sn denote the sum of the digits of n. The number of integers between 10 and 1000 for which P

_{n}+5_{n}= n is