How many of the following numbers are divisible by 3 but NOT by 9?

5826, 5964, 6039, 6336, 6489, 6564, 6867 and 6960

The distribution of monthly expenditure of Ramesh on various items is shown in the following pie chart.

If the monthly income of Ramesh is ₹45,000, then find his total monthly expenditure (in ₹) on housing and transportation.

The sum of the cubes of two given natural numbers is 9728, while the sum of the two given numbers is 32. What is the positive difference between the cubes of the two given numbers?

A circular arc whose radius is 4 cm makes an angle 45° at the centre. Find the perimeter of the sector formed.

(Take π = $\frac{22}{7}$)