2. Look at the sequence of numbers on one column of the Ishango bone: 11, 13, 17, 19. What do these numbers have in common? List the next three numbers that fit this pattern.

 The World of Numbers। Ganita Manjari Class 9th

Solution

Given Numbers: 11, 13, 17, 19

Observation:

• 11 is a prime number.
• 13 is a prime number.
• 17 is a prime number.
• 19 is a prime number.

Therefore, all the numbers in the sequence are prime numbers.

Next Prime Numbers after 19:

23, 29, 31

Answer:
Common Property: All the numbers are prime numbers.
Next three numbers in the pattern: 23, 29, 31.