Question

1)What is the next number in the series 4743,4137,3129,2319, ?

2)What is the next number in the series 3,7,13,19,29, ?

Answer 1

2) This series is the alternative series of prime numbers .
That is the series of prime numbers
=

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, .......

From this we select the alternative series,
As per the question we choose the number 3 as the first number.
So the series is


3, 7, 13, 19, 29, 37
So the required number is 37.

Dear student,
Dont ask multiple question at a time. Here we answered the second question. Please ask the other question as new question.