HOLIDAYS ASSIGNMENT
Std. IX
Worksheet of CH-1 (Number system)
Q1. Find which of the following x,y,z and u represent rational numbers and which irrational
numbers
(a) x2 = 5 (b) y2 = 9 (c) z2 = 0.4 (d) u2 = 17
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Answer:
a) 2.5 b) 4.5 c) 0.2 d) 8.5
Step-by-step explanation:
(a) x2 = 5
= x = 5 divided by 2
=x = 2.5
(b) y2 = 9
=y = 9 divided by 2
= y = 4.5
(c) z2 = 0.4
= z = 0.4 divided by 2
= z = 0.2
(d) u2 = 17
= u = 17 divided by 2
= u= 8.5
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