Question

How many prime numbers are of the form 10n + 1, where n is a whole
number such that 1sn10?​

Answer 1

Answer:

Step-by-step explanation:





HOW MANY PRIMES ARE OF THE FORM 10n+1, WHERE n IS A WHOLE NUMBER SUCH THAT 1 < OR= TO n < OR = 10???

the number is of the form 10n+1 , []

10*1+1=11 is a prime number

10*2+1=21 is not a prime number

10*3+1 = 31 is a prime number.

10*4+1 = 41 is a prime number.

10*5+1 = 51 is not a prime number [sum of digits is divisible by 3, thus the number is divisible by 3]

10*6+1 = 61 is a prime number.

10*7+1 = 71 is a prime number.

10*8+1 = 81 is not a prime number.

10*9+1 = 91 is not a prime number. [divisible by 13 and 7]

10*10+1=101 is a prime number.

therefore 7 prime numbers of the form 10n+1 exist. where []

hope this helps you.

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