CTET Paper II (Mathematics and Science) 24 Dec 2021 Solved Paper

Concept:Associative property means grouping does not affect result for addition or multiplication, but not for subtraction or division. Multiplicative inverse of a number is its reciprocal (1 divided by that number).Explanation:Check each option one by one.Option 1: Multiplication is associative for integers. This is true: (a × b) × c = a × (b × c).Option 2: Division is not associative for integers. For example, (8 ÷ 4) ÷ 2 = 1, but 8 ÷ (4 ÷ 2) = 4. So this statement is false.Option 3: Convert $1\frac{4}{5}$ to improper fraction: $\frac{9}{5}$. Its multiplicative inverse is $\frac{5}{9}$. So the statement is true.Option 4: Convert to decimals: $\frac{-7}{10} = -0.7$, $\frac{-3}{5} = -0.6$, $\frac{-5}{8} = -0.625$. Since -0.625 lies between -0.7 and -0.6, the statement is true.The only false statement is option 2.Answer:Option 2