Edit in JSFiddle

const userList = [
  { name: 'Alex', age: 51, country: 'USA' },
  { name: 'Varun', age: 26, country: 'India' },
  { name: 'Raman', age: 16, country: 'India' },
  { name: 'Max', age: 11, country: 'USA' },
  { name: 'Vishal', age: 32, country: 'India' }
];

/*  Check if all users are India */
const areAllIndianUsers = userList.every(user => {
  return user.country === 'India';
});
/*  Printing variable areAllIndianUsers */
console.log('Is every user Indian:-', areAllIndianUsers);


/*  Check if all users are 18+ */
const areAllEighteenPlusUsers = userList.every(user => {
  return user.age > 18;
});
/*  Printing  variable areAllEighteenPlusUsers */
console.log('Is every user 18+:-', areAllEighteenPlusUsers);


/*  Check if all users are below 60 */
const areAllBelowSixtyUsers = userList.every(user => {
  return user.age < 60;
});
/*  Printing  variable areAllBelowSixtyUsers */
console.log('Is every user below 60 age:-', areAllBelowSixtyUsers);