Definition: A prime number is a whole number with exactly two integral divisors, 1 and itself. The number 1 is not a prime, since it has only one divisor.
Q. Is 1 a prime number?
I was surprised because among mathematicians, 1 is universally regarded as non-prime. The confusion begins with this definition a person might give of “prime”: a prime number is a positive whole number that is only divisible by 1 and itself. The number 1 is divisible by 1, and it’s divisible by itself.
Q. What is special about the number 1?
1 is the only positive integer divisible by exactly one positive integer, whereas prime numbers are divisible by exactly two positive integers, composite numbers are divisible by more than two positive integers, and zero is divisible by all positive integers.
Q. What are odd numbers from 1 to 1000?
In case of numbers from 1 to 1000, there are 500 odd numbers and 500 even numbers. A few odd numbers list include numbers like: -5, -3, -1, 1, 3, 5 , 7 , 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, etc.
Q. Which is the odd number?
Odd numbers are whole numbers that cannot be divided exactly into pairs. 1, 3, 5, 7, 9, 11, 13, 15 … are sequential odd numbers. Odd numbers have the digits 1, 3, 5, 7 or 9 in their ones place.
Q. Is 0 an even or odd number?
So what is it – odd, even or neither? For mathematicians the answer is easy: zero is an even number.
Q. What is the largest six digit number you can make that ends in an even number?
999999
Q. How can you make six an odd number?
9 in reverse gives 6.
- Mirror always reflects everything in reverse.
- This is the reason we can write 9 which is an odd number and cannot be divided in to a smaller fraction when viewed in the mirror reflects the even number 6.
- This shows that when 6 is turned round by 180 degrees in own vertical plane.
Q. What is the smallest 6 digit odd number?
To form the smallest 6-digit number, we have to start number with the smallest digit and end with the largest digit. So, the greatest six digit odd number is 999999 and the smallest six digit even number is 222222. Sum of these numbers is 999999+222222 = 1222221.
Q. What is the six digit largest number?
999,999
Q. What is the greatest 4 digit even number?
Answer: 9998 is the right answer.
Q. What is a 4 digit even number?
Zero is an even number. The smallest odd number in 4 digits depends. If leading zeroes are permitted, it will be 0000, an even number. If leading zeroes are NOT permitted, the smallest number in 4 digits will be 1000, an even number.
Q. What is the greatest 4 digit number which has four different even numbers?
9857
Q. What is the 4 digit smallest number?
1000
Q. How many different 4 digit even numbers can be formed?
120 ways
Q. What is the least 4 digit odd number?
1001
Q. How many 4 digit even numbers can be formed using the digits 0 to 9 if repetition is not allowed?
We can only use 5 numbers for the fourth digit. The number of 4 digit even numbers than can be formed using 0 to 9 is 504 * 5 = 2520.
Q. How many different 4 digit odd numbers are there where the first digit is not zero?
Total possible 4 digit odd numbers that cannot have the first digit as a 0 or a 3 are (5000-500-0 = 4500). Answer = 4500.
Q. How many 4 digit numbers can be formed using only the odd digits?
=24 permutations of the 4 digits. Half of them end in 0 or 2, so only 12 of them are odd.
Q. How many odd numbers of 4 digits have distinct digits?
total four-digit odd integers with different digits: 5*8*8*7=35*64=2240. Answer (C).
