diff --git a/ghufran/maartjes-work.js b/ghufran/maartjes-work.js
new file mode 100644
index 000000000..8a9593f4e
--- /dev/null
+++ b/ghufran/maartjes-work.js
@@ -0,0 +1,77 @@
+'use strict';
+
+const monday = [
+  {
+    name: 'Write a summary HTML/CSS',
+    duration: 180,
+  },
+  {
+    name: 'Some web development',
+    duration: 120,
+  },
+  {
+    name: 'Fix homework for class10',
+    duration: 20,
+  },
+  {
+    name: 'Talk to a lot of people',
+    duration: 200,
+  },
+];
+
+const tuesday = [
+  {
+    name: 'Keep writing summary',
+    duration: 240,
+  },
+  {
+    name: 'Some more web development',
+    duration: 180,
+  },
+  {
+    name: 'Staring out the window',
+    duration: 10,
+  },
+  {
+    name: 'Talk to a lot of people',
+    duration: 200,
+  },
+  {
+    name: 'Look at application assignments new students',
+    duration: 40,
+  },
+];
+/* cSpell: disable */
+const maartjesTasks = monday.concat(tuesday);
+const maartjesHourlyRate = 20;
+
+function computeEarnings(tasks, hourlyRate) {
+    // turn mins to hours
+    const duration = tasks.map(task => task.duration / 60);
+    return { ...task, duration: hours };
+  };
+
+  // remove less than 2 hours
+  const filteredHour = duration.filter(elem => elem.duration >= 2);
+  // earnings for the duration less than 2 hours
+  return filteredHour.reduce((acc, elem) => {
+    acc += elem.duration * hourlyRate;
+    return acc;
+  }, 0);
+}
+console.log(computeEarnings(maartjesTasks, maartjesHourlyRate));
+
+const earnings = computeEarnings(maartjesTasks, maartjesHourlyRate);
+
+// set the decimal nrs to have only two values
+const roundEuros = earnings.toFixed(2); // 373.33333333333337
+
+// call the value of toFixed(2)
+console.log(`Maartje has earned €${roundEuros}`); // Maartje has earned €373.33
+
+module.exports = {
+  maartjesTasks,
+  maartjesHourlyRate,
+  computeEarnings,
+};
+/* cSpell: enable */
diff --git a/ghufran/map-filter.js b/ghufran/map-filter.js
new file mode 100644
index 000000000..651fb6ae7
--- /dev/null
+++ b/ghufran/map-filter.js
@@ -0,0 +1,14 @@
+'use strict';
+
+function doubleOddNumbers(num) {
+  num = num.filter(n => n % 2 !== 0).map(number => number * 2);
+  return num;
+}
+
+const myNumbers = [1, 2, 3, 4];
+console.log(doubleOddNumbers(myNumbers)); // [2, 6] the double of [1,3]
+
+module.exports = {
+  myNumbers,
+  doubleOddNumbers,
+};