Question

47. By interchanging the digits of the numbers in the given number series how
many Prime numbers will form?
Letters: 31, 59, 35, 19, 17, 34, 16, 89, 74
(1) 5
(2) 7
(3) 4
(4) 6​

Answer 1

Answer:

7

Step-by-step explanation:

31 is a prime number by interchanging 31 we will get 13 and 13 is also a prime number .

59 is a prime number but if we interchange it we will not get a prime number .

35 is not a prime number but if we interchange 35 we will get a prime number that is 53 .

19 is a prime number but if we interchange 19 we will not get prime number .

17is a prime number by interchanging 17 we will get 17 and 17 is also a prime number .

43is a prime number but if we interchange it we will not get a prime number