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SAI International School
Class VIII

Mathematics
Chapter 13- DIRECT & INVERSE PROPORTION
Worksheet

Subtopic: INVERSE PROPORTION INTRODUCTION & APPLICATION

(1)If ‘x’ and ‘y’ are in an inverse variation then which of the following is correct?
(a) x – y = constant
(b) x + y = constant
(c) xy = constant

(d)

(2) If ‘A’ can finish a work in ‘n’ days then part of work finished in 1 day is:
(a) 1 – n

(b)
(c) n – 1
(d) none of these

(3) If amount of work completed by ‘A’ in one day is then the whole work will be finished by ‘A’ is:
(a) n days
(b) 1 – n days
(c) n – 1 days
(d) none of these.

(4) If an increase in one quantity brings about a corresponding decrease in the other and vice versa,
then the two quantities vary:
(a) directly
(b) inversely
(c) sometimes directly and sometimes inversely
(d) none of these.

(5) “If speed is more than time to cover a fixed distance would be less”. This is a case of:
(i) inverse variation
(ii) direct variation
(ii) direct variation
(iv) none of the above.

(6)Which of the following is true for a ratio?
(a) the quantities are always in the same unit.
(b) the quantities may be in different unit.
(c) the quantities are always in different units.
(d) none of the above.