The given figure represents a weighing balance. The weights of some objects in the balance are given. Find the weight of each square and the circle.

If one side of a square is represented by 18x – 20 and the adjacent side is represented by 42 – 13x, find the length of the side of the square.

Follow the directions and correct the given incorrect equation, written in Roman numerals:

(a) Remove two of these matchsticks to make a valid equation:

(b) Move one matchstick to make the equation valid. Find two different solutions.

What does a duck do when it flies upside down? The answer to this riddle is hidden in the equation given below:

If i + 69 = 70, then i = ? If 8u = 6u + 8, then u = ?

If 4a = –5a + 45, then a = ? if 4q + 5 = 17, then q = ?

If –5t – 60 = – 70, then t = ? If s + 98 = 100, then s = ?

If p + 9 = 24, then p = _____?

If 3c = c + 12, then c = _____?

If 3 (k + 1) = 24, then k = _____?

For riddle answer: substitute the number for the letter it equals

The three scales below are perfectly balanced if • = 3. What are the values of ∆ and *?

A.

B.

C.