Page 13 - Ramanujan Yatra

Ramanujan
YATRA
4
First, take the initial number as zero. Add 3 to it and then multiply it by 2. It becomes 6. Again add 2 and then multiply it by 5. The result will be 40. The trick is such that after multiplication by 5 the last digit of the result will always be 0. Now, assume any number between 1 and 9 and add the assumed number to the obtained result. Let, the assumed number is 8. So, the total number will be 48. If we just subtract 40 from the total number (48), we will get 08. The last digit of the subtracted number is the assumed number, i.e., 8. Now, remove the last digit and the truncated number, i.e., 0 is the initial number. It is illustrated for case 2.
Case 2: The final number was 7679. Subtract 40 from it. We will get 7639. Here, 9 is the last digit. So the assumed number is 9. After removing the last digit, the truncated number is 763. Therefore, the initial number is 763.
From the above examples, anyone can develop their own number tricks and can also play them with their friends and relatives.
PRIME NUMBER GAME
From the beginning of human history, prime numbers aroused great curiosity. One of the most interesting things about prime numbers is their distribution among the natural numbers. On a small scale, the appearance of prime numbers seems random, but on a large scale there appears to be a pattern, which is still not fully understood. A prime number is any number that can be divided only by itself and by 1. In mathematics, a Ramanujan prime is a prime number that satisfies a result proven by Srinivasa Ramanujan relating to the prime-counting function.
There are a lot of applications of prime numbers. Huge volumes of confidential information (credit card numbers, bank account numbers etc.) and large amounts of money are transferred electronically around the world every day, all of which must be done securely. To keep confidentiality, prime and composite numbers play an important role in modern cryptography or coding systems.
Here is a simple game with seven consecutive prime numbers from 3rd to 9th prime numbers.
At first, note the prime numbers (p) up to 9th term. The prime numbers up to 9th term are shown in Table 1.