Write the first 6 multiples of 7. Which of them is also a multiple of 14?

State whether the following sets are finite or infinite:

(a) Set of all whole numbers

(b) Set of odd numbers between 3 and 15

(c) Set of months in a year

Draw a rough diagram of two intersecting lines and label them properly.

Arrange the following numbers in descending order:

84627, 8467, 846720, 84672. Also, identify the smallest and largest number.