Mathematical Operations - Problem Solving by SubstitutionMathematical Operations - Interchange of Signs And NumbersMathematical Operations - Deriving The Appropriate Conclusions
1.By applying which of the following meanings of arithmetical sign will the value of $700 - 10 \div \frac{1}{2} \times 35 + 70 $ be zero? x means /, + means - , / means x , - means + A) x means /, + means x , / means + , - means - B) x means /, + means - , / means x , - means + C) x means +, + means - , / means x , - means / D) x means /, + means - , / means x , - means + E) None of these View Answer Report DiscussAnswer: Option CExplanation:Using the operations given ,we get as 700 ÷ 10 x 1/2 + 35 - 70 = 70 x 1/2 + 35 - 70 =35 + 35 - 70 = 0
2.Which of the following meanings of the arithmetical signs will yield the value 'zero' for the expression given below? 200 x 100 + 300 x 200 -10 / 2 + 40 A) + means -, - means x, x means /, / means + B) + means -, - means /, x means +, / means x C) + means x, - means -, x means /, / means + D) + means /, - means +, x means -, / means x E) None of these View Answer Report DiscussAnswer: Option BExplanation:Using the option b we get 200 + 100 - 300 + 200 / 10 x 2 - 40 = 300 - 300 + 20 x 2 - 40 = 0 + 40 - 40 = 0
3.The two expressions in either side of the sign(=) will have the same value if two terms on either side or on the same side are interchanged. The correct terrns to be interchanged have been given as one of four under the expression. Find. the correct alternative 8 / 2 x 5 - 11 + 9 = 6 x 2 - 5 + 4 / 2 A) 5,9 B) 8,5 C) 9,6 D) 11,5 View Answer Report DiscussAnswer: Option CExplanation:On interchanging 9 and 6 , we get the statement as : 8 / 2 x 5 - 11 + 6 = 9 x 2 - 5 + 4 / 2 or 4 x 5 - 11 + 6 = 18 - 5 + 2 or 15 = 15
4.Which of the following four interchanges in signs and numbers would make the given equation correct? 6 x 4 + 2 = 16 A) + and x , 2 and 4 B) + and x , 2 and 6 C) + and x, 4 and 6 D) None of these View Answer Report DiscussAnswer: Option CExplanation:On interchanging + and x and 4 and 6 ,we get the equation as: 4 + 6 x 2 = 16 or 4 + 12 = 16 or 16 = 16
5.The two expression in either side of the sign(=) will have the same value if two terms on either side or on the same side are interchanged. The correct terrns to be interchanged have been given as one of four under the expression. Find. the correct alternative. 5 + 3 x 6 - 4 / 2 = 4 x 3 - 10 / 2 + 7 A) 4,7 B) 5,7 C) 6,4 D) 6,10 View Answer Report DiscussAnswer: Option CExplanation:On interchanging 6 and 4 on L.H.S., we get the statement as: 5 + 3 x 4-6 / 2 = 4 x 3 - 10 + 2 / 7 or 5 + 12 - 3=12- 5 + 7 or 14=14
Mathematical Operations - Problem Solving by SubstitutionMathematical Operations - Interchange of Signs And NumbersMathematical Operations - Deriving The Appropriate Conclusions