x times of 3 is added to the smallest natural number.

Perimeter of a rectangle is found by using the formula P = 2 ( l + w), where l and w are respectively the length and breadth of the rectangle. Write the rule that is expressed by this formula in words.

One more than twice the number.

Complete the table and find the solution to the equation m - 7 = 3.

Pick out the solution from the values given in the brackets next to each equation. Show that the other values do not satisfy the equation.

(a) 5m = 60 (10, 5, 12, 15)

(b) n + 12 = 20 (12, 8, 20, 0)

(c) p – 5 = 5 (0, 10, 5, -5)

(d) =7 (7, 2, 10, 14)

(e) r - 4 = 0 (4, -4, 8, 0)

(f) x + 4 = 2 (-2, 0, 2, 4)

Complete the table and by inspection of the table find the solution to the equation m + 10 = 16.

Complete the entires in the third column of the table.

Solve the following riddles, you may yourself construct such riddles.

Who am I?

(i) Go round a square

Counting every corner

Thrice and no more !

Add the count to me

To get exactly thirty four !

(ii) For each day of the week

Make an upcount from me

If you make no mistake

You will get twenty three !

(iii) I am a special number

Take away from me a six !

A whole cricket team

You will still be able to fix !

(iv) Tell me who I am

I shall give a pretty clue !

You will get me back

If you take me out of twenty two !

Complete the table and by inspection of the table, find the solution to the equation 5t = 35.

Complete the table and find the solution of the equation = 4 using the table

State which of the following are equations (with a variable). Give reason for your answer. Identify the variable from the equations with a variable.

(a) 17 = x + 7

(b) (t-7) > 5

(c) = 2

(d) 7 × 3 – 19 = 8

(e) 5 × 4 – 8 = 2x

(f) x – 2 = 0

(g) 2m< 30

(h) 2n + 1 = 11

(i) 7 = (11×5) – (12×4)

(j) 7 = (11×2) + p

(k) 20 = 5y

(l) < 5

(m) z + 12 > 24

(n) 20 – (10-5) = 3×5

(o) 7 – x = 5