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Which one of these is NOT equal to a rational number?

Class 9Rational and Irrational NumbersNumber Systems

A $4 + 9$
B0.6 + 0.4
C $2 + 8$
D $\frac{7}{2} - \frac{1}{2}$

Step-by-Step Solution

2 + 8 = 2 + 22 = 32

, which is irrational. The others simplify to 5, 1.0 and 3 respectively (all rational).

Answer: C)

2 + 8

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