Take any three consecutive even numbers and add them , say ,
` 2+4 + 6= 12 , 4 +6 + 8 = 18 , 6 + 8 + 10 = 24 , 8 + 10 + 12 = 30` and so on.
Is there any pattern can you guess in these sums? What can you conjecture about them?

Let A = { 2, 4, 6, 8} and B = { 6, 8, 10, 12} . Find A ∪ B .

The following geometric arrays suggest a sequence of numbers. (a) Find the next three terms . (b) Find the 100^(th) term . (c) Find the n^(th) term . The dots here arranged in such a way that they form a rectangle. Here T_1 =2 , T_2 = 6 , T_3 = 12 , T_4 = 20 and so on. Cay you guess what T_5 is ? What about T_6 ? What about T_n ? Make a conjecture about T_n .

Let A = {2, 4, 6, 8, 10, 12} and B = {3, 6, 9, 12, 15}. Find AuuB and AnnB .

If A = {2, 4, 6, 8, 10} and B = {3,6, 9, 12, 15}, find A - B and B - A.

Let A = {1, 2, 3, 4, 5, 6, 7} and B = {2, 4, 6, 8, 10, 12}. Find the intersection of A and B.

Find the variance and standard deviation of the following data 5,12 , 3 , 18 , 6 , 8 , 2, 10 .

Complete the pattern. 8 – 6 = 2 8 – 5 = 3 8 – 4 = 8 – 3 = 8 – 2 = 8 – 1 = 8 – 0 = 8 – (–1) = 8 – (–2) = 8 – (–3) = 8 – (–4) = When you subtract a positive integer in which direction do you move on the number line?

Complete the pattern. 8 – 6 = 2 8 – 5 = 3 8 – 4 = 8 – 3 = 8 – 2 = 8 – 1 = 8 – 0 = 8 – (–1) = 8 – (–2) = 8 – (–3) = 8 – (–4) = When you subtract a negative integer, in which direction do you move on the number line?

The sum of numbers formed by taking all the digits 2,4,6,8 is