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Which numbers less than 100 with a 1 in the units place are a prime number?
Wiki User
∙ 9y ago
11, 31, 41, 61, 71
Wiki User
∙ 9y ago
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what is less than 100 with a 1 in the units place are prime number?
2, 3, 5, and 7 are prime numbers for one digit numbers. 1 is NOT a prime number.
What are all the prime numbers with 1 in the units place?
All of them??? There are probably infinitely many. Here are the first few numbers with 1 in the units place: 1: Not usually considered a prime number. 11: Prime 21: Not prime (divisible by 3) 31: Prime 41: Prime 51: Divisible by 3 61: Prime 71: Prime 81: Divisible by 3 91: Divisible by 7 101: Prime ...
The largest known prime number is equal to how many inches?
Prime numbers are pure numbers, without units or dimensions.
Is the number 2.9 centimeters composite or prime?
The question doesn't apply to mixed numbers, like 2.9. A mixed number is neither one. Also, "2.9 centimeters" is not a number; it's a length. Prime and composite numbers have no units. They're just bare numbers. 29 is a prime number.
Do all 2 digit prime numbers have a units number of 1 3 7 or 9?
Yes
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.
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.
What is the digit in the units place of a number is 5 if the no lies between 150 and 200 will be composite or prime?
For any integer greater than 5, where the units digit is 5 then that number can be expressed as the product of n and 5. As such, the number is composite. Therefore all numbers in the range 150 to 200 that have a units digit of 5 are composite,.
What is the units digit of the product of the 1000 smallest prime numbers?
Long way: find the smallest prime numbers and use a calculator. Short way: recognize that 2 and 5 are both prime. Multiply them to get 10. We know that every multiple of ten has a 0 in the units place, so the answer to your question is 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 two digit prime numbers have a units digit of 7 and what are the prime numbers?
17, 37, 47, 67, 97
Two prime numbers between 100 and 199 such that the tens digit is a prime number and the tens and ones digit taken together are a 2 digit prime number find the sum of these two prime numbers?
For the tens digit to be a prime number then it must equal 2, 3, 5 or 7. There are four 3-digit prime numbers that fit the above condition and also have the tens and units digits forming a 2-digit prime number. 131, 137, 173, 179. The person supplying the question may like to sum the various combinations.
