Gujarat BoardEnglish MediumSTD 6MATHSWhole Numbers1 Mark
MCQ
If $a$ and $b$ are whole numbers, then $a - b$ is:
A
A whole number
B
A natural number
C
A negative integer
✓
None of the above
✓
Answer
Correct option: D.
None of the above
If $a$ and $b$ are whole numbers, then there may be the following $3$ cases:
Case $1$: When $a > b$ Then, $a - b \Rightarrow $ Whole/ Natural number
Case $2$: When $a < b$Then, $a - b \Rightarrow $ Integer
Case $3$: When $a = 0$ and $b = 0$ Then, $a - b \Rightarrow $ Whole number.
Hence, option $D$ is correct.
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