How many 3 digit numbers can be formed where unit place is prime?
Hence, 90 different combinations of digits are allowed to form three digit numbers having 3 at units place when repetition of digits is allowed.
How many 3 digit numbers are there in which all the digits are prime numbers?
There are only four possible prime digits, viz. 2, 3, 5 and 7; so there are only 24 three-digit numbers all of whose digits are prime and different.
How many 3 digit numbers are there which do not contain any prime number?
100 is not a prime number. 101 < 11 and 101 is not divisible by any of the prime numbers 2, 3, 5, 7, 11. 101 is a prime number. Hence 101 is the smallest 3-digit prime number….Discussion :: Numbers – General Questions (Q. No. 17)
| [A]. | 101 |
|---|---|
| [C]. | 109 |
| [D]. | 113 |
Can a 3 digit number be a prime number?
Answer: 101 is the smallest 3-digit prime number. Let’s find the smallest 3-digit prime number. Explanation: 101 is not divisible by any of the prime numbers 2, 3, 5, 7… Hence, 101 is a prime number.
How many three digit numbers are divisible by 7 can be formed by the first three prime numbers?
Only A) 1 i.e. 532 out of all three-digit numbers will be divisible by 7.
Which of the following is a prime number 3 digit?
The first 1000 prime numbers
| 1 | 3 | |
|---|---|---|
| 21–40 | 73 | 83 |
| 41–60 | 179 | 191 |
| 61–80 | 283 | 307 |
| 81–100 | 419 | 431 |
How many possible 3 digit numbers are formed by 1 2 3?
Well 3 digit numbers formed by 1,2,3 can be repetitive or non repetitive type. If repetition of any number is allowed: Then 3³ = 3x3x3 = 27 possibilities. Suppose xyz is 3 digit number then. For x we have 3 possibilities, for y 3 possibilities and for x again 3 possibilities if repetition is allowed so possible numbers = 3x3x3 = 27.
How many 3 digit prime numbers are there between 101-1k and 900?
Here are all the 3 digit prime numbers, i.e. all prime numbers between 101-1,000. 1 100s 2 200s 3 300s 4 400s 5 500s 6 600s 7 700s 8 800s 9 900s All in all, there are 143 prime numbers from 101-1,000. This means that 143/900 or around 1 in 6 numbers from 101-1,000 are prime. 757 numbers are…
How many three digit numbers can be formed from four primes?
There are 4 single digit primes namely 2,3,5,7 and using them without repetition 4p3=4! three digit numbers can be formed, i.e. 24 numbers.
How many three digit numbers are there with 6 nonzero digits?
Any of the 6 nonzero digits can be chosen for the hundreds position, and of the remaining 6 digits for the tens position, leaving 5 digits for the units position. So, there are (6) (5) (5) = 150 three digit numbers.