Which out of the following are expressions with numbers only?
(a) y + 3 (b) (7 × 20) – 8z
(c) 5(21 – 7) + 7 × 2 (d) 5
(e) 3x (f) 5 – 5n
(g) (7 × 20) – (5 × 10) – 45 + p
Answer:
Expression (y+3) has variable y.
Expression (7 × 20) – 8z has variable z.
Expression 5(21 – 7) + 7 × 2 has only numbers but no variable.
Expression 5 has no variable.
Expression 3x has variable x.
Expression (5 – 5n) has variable n.
Expression (7 × 20) – (5 × 10) – 45 + p has variable p.
Therefore, expressions (c) and (d) does not have any variable but just have numbers.
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