1. what is the previous 2 prime number before 37

Solution:
We need to test each number to find the previous prime

36 is not prime, because it is divisible by 2

35 is not prime, because it is divisible by 5

34 is not prime, because it is divisible by 2

33 is not prime, because it is divisible by 3

32 is not prime, because it is divisible by 2

31 is prime, So Prime:1 = 31

30 is not prime, because it is divisible by 2

29 is prime, So Prime:2 = 29

Previous 2 prime before 37
31, 29 2. what is the previous prime number before 50

Solution:
We need to test each number to find the previous prime

49 is not prime, because it is divisible by 7

48 is not prime, because it is divisible by 2

47 is prime, So Prime:1 = 47

Previous prime before 50
47

---

3. what is the previous prime number before 100

Solution:
We need to test each number to find the previous prime

99 is not prime, because it is divisible by 3

98 is not prime, because it is divisible by 2

97 is prime, So Prime:1 = 97

Previous prime before 100
97

---

---