101 तथा 300 के बीच कितनी संख्याएँ हैं जो 3 तथा 5 से पूर्णतः विभाजित है...
Question: 101 तथा 300 के बीच कितनी संख्याएँ हैं जो 3 तथा 5 से पूर्णतः विभाजित हैं?
Solution:
To solve this question, we need to find the numbers between 101 and 300 which are completely divisible by 3 and 5.
Step 1: Finding the smallest number between 101 and 300 which is completely divisible by 3 and 5.
The smallest number between 101 and 300 which is completely divisible by 3 and 5 is 105.
Step 2: Finding the largest number between 101 and 300 which is completely divisible by 3 and 5.
The largest number between 101 and 300 which is completely divisible by 3 and 5 is 300.
Step 3: Finding the total number of numbers between 101 and 300 which are completely divisible by 3 and 5.
To find the total number of numbers between 101 and 300 which are completely divisible by 3 and 5, we need to count the numbers in the sequence 105, 110, 115, ..., 300.
We can find the count of this sequence by using the formula:
Count = (Last term - First term) / Common difference + 1
Here, the first term is 105, the last term is 300, and the common difference is 5.
So, Count = (300 - 105) / 5 + 1 = 39
Therefore, there are 39 numbers between 101 and 300 which are completely divisible by 3 and 5.
Step 4: Finding the numbers between 101 and 300 which are completely divisible by 3 and 5.
To find the numbers between 101 and 300 which are completely divisible by 3 and 5, we can list the numbers in the sequence 105, 110, 115, ..., 300.
By listing these numbers, we get:
105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, 285, 290, 295
Therefore, there are 13 numbers between 101 and 300 which are completely divisible by 3 and 5.
Hence, the correct answer is option (a) 13.