Using any or all of the figures 1,2,3,7 write down:
a) the smallest prime number
b) a prime number greater than 20
c) a prime number between 10 and 20
d) two prime numbers whose sum is 20
e) a number that is not prime
a) 2
b) 23
c) 11
d) 11 and 9
e) 12
Find all the prime numbers between 40 and 50.
Did u know my dad was 39 and my mom was 27 when I was born
a) The smallest prime number is 2. It is the only even prime number and the only number that is divisible only by 1 and itself.
b) To find a prime number greater than 20 using the given figures, we can combine the digits 2 and 3 to form 23. Since 23 is between 20 and 30 and it is only divisible by 1 and itself, it is a prime number.
c) To find a prime number between 10 and 20 using the given figures, we can use the digit 7 to form 17. Since 17 is between 10 and 20 and it is only divisible by 1 and itself, it is a prime number.
d) To find two prime numbers whose sum is 20, we can combine the digits 7 and 13. The number 7 is a prime number, and 13 is also a prime number. When we add them together (7 + 13 = 20), the sum is 20.
e) To find a number that is not prime using the given figures, we can combine the digits 1 and 3 to form 13. Since 13 is only divisible by 1 and itself, it is a prime number. Thus, there is no number using the given figures that is not prime.