“Variable” means that it
(A) can take different values (B) has a fixed value
(C) can take only 2 values (D) can take only three values
In algebra, letters may stand for
(A) known quantities (B) unknown quantities
(C) fixed numbers (D) none of these
Which of the following equations does not have a solution in integers?
(A) x + 1 = 1 (B) x – 1 = 3 (C) 2x + 1 = 6 (D) 1 – x = 5
For any two integers x and y, which of the following suggests that operation of addition is commutative ?
(A) x + y = y + x (B) x + y > x (C) x – y = y – x (D) x × y = y × x
Which of the following equations has x = 2 as a solution?
(A) x + 2 = 5 (B) x – 2 = 0 (C) 2x + 1 = 0 (D) x + 3 = 6
If the perimeter of a regular hexagon is x metres, then the length of
each of its sides is
(A) (x + 6) metres (B) (x ÷ 6) metres
(C) (x – 6) metres (D) (6 ÷ x) metres
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