120 = 2^3 * 3 * 5
2250 = 2 * 3^2 * 5^3

Now, GCD of 120 and 2250 = 2 * 3 * 5 = 30

# Python program illustrating 
# gcd() method 
import numpy as np 
  
arr1 = [120, 24, 42, 10]
arr2 = [2250, 12, 20, 50]
  
print ("arr1 : ", arr1)
print ("arr2 : ", arr2)
  
print ("\nGCD of arr1 and arr2 : ", np.gcd(arr1, arr2))
print ("\nGCD of arr1 and 10   : ", np.gcd(arr1, 10))
           

arr1 : [120, 24, 42, 10]
arr2 : [2250, 12, 20, 50]

GCD of arr1 and arr2 : [30, 12,  2, 10]

GCD of arr1 and 10   : [10,  2,  2, 10]