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How many two digit prime numbers have a units digit of 7 and what are the prime numbers?
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What is the units digit of the product of the first 100 prime numbers?
0 Look at the product of the first 3 prime numbers: 2 x 3 x 5 = 30. Any number multiplied by 30 will have a 0 in the units digit. So, no matter how many prime numbers you are multiplying, if once you have a number ending in 0, all of the rest will end in 0.
How many 2 digit prime numbers are there?
there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100
How many 2 digit prime numbers are there whose unit digit is greater its tens digit?
Ten.
How many positive prime numbers have a ones digit of 5?
Only one positive prime number has a 5 in the ones digit. That prime number is 5. All other numbers with a 5 in the ones digit are composite because they will be divisible by 5.
How many two digit prime numbers end in the digit 3?
13, 23, 43, 53, 73 & 83
How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?
There are 5 of them.
How many two digit prime numbers are there?
There are 21 two-digit prime numbers.
How many of the integers from 1 to 121 that have a units digit of 1 are prime?
The prime numbers with a units digit of 1 in the range 1 - 121 are :- 11, 31, 41, 61, 71 and 101.......making 6 primes in total.
What is the units digit of the product of the first 100 prime numbers?
0 Look at the product of the first 3 prime numbers: 2 x 3 x 5 = 30. Any number multiplied by 30 will have a 0 in the units digit. So, no matter how many prime numbers you are multiplying, if once you have a number ending in 0, all of the rest will end in 0.
How many prime numbers up to 100 have the number 9 as their units digit?
19 29 59 79 89 Five of them.
How many three digit numbers have odd prime number as 1st digit A prime number as 2nd digit and an odd number as 3rd digit?
There are 17 such numbers.
How many two-digit primes are there whose units digit is less than its ten digits?
There is no simple formula for that; I suggest you look up the prime numbers in a table of prime numbers, analyzing each prime number in the range 10-99 whether it fulfills this specific criterion.
How many 5 digit prime numbers are there?
An on-line prime number chart ended at 10007. There are many more charts available for download. So the answer is that there are many five digit prime numbers.
How many 2 digit prime numbers are there?
there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100
How many 4 digit numbers are all made of prime numbers?
24 of them.
How many 2 digit prime numbers are there whose unit digit is greater its tens digit?
Ten.
How many 3 digit numbers can you make using the numbers 1 2 3 and 4. if the hundred digit is a prime number and repetition of a digit is not permitted?
From {1, 2, 3, 4} there are two prime numbers (2, 3} which can go in the hundreds position, which once chosen allows 3 possible choices for the tens digit and a further 2 possible choices for the units digit, giving 2 x 3 x 2 = 12 possible numbers.
