Mathematical Operations - Interchanging of Symbols
Mathematical Operations - Interchanging of Symbols
Mathematical Operations: As you know that in the questions based on simple mathematical operations the four fundamental mathematical operations that is addition, subtraction, multiplication and division and relational operators that is less that, more than etc are to be rearranged to get the desired result.
Making Equation Correct by Interchanging the Symbols: In these type of questions certain equations are written and the candidate is asked to interchange the position of the symbols or numbers so that the equation becomes correct.
Illustration: In the following question , the given equation becomes correct after interchanging two signs. One of the four alternatives under it specifies the interchange of signs in the equation which when made will make the equation correct. Find the correct alternative.
A. + and x B. and x C.
and - D. + and -
Answer: C
Solution: On interchanging and -, we get
= 9 + 5 -2
= 12 = R.H.S.
Illustration: In the following question , the given equation becomes correct after interchanging two signs. One of the four alternatives under it specifies the interchange of signs in the equation which when made will make the equation correct. Find the correct alternative.
A. + and - B. C.
D.
Answer : D
Solution: On interchanging , we get
Illustration: If the given interchanges namely : signs + and and numbers 2 and 4 are made in signs and numbers, which one of the following four equations would be correct ?
(a) 2 + 4 3 = 3 (b) 4 + 2
6 = 15 (c) 4
2 + 3 = 4 (d) 2 + 4
6 = 8
Answer: D
Solution : - on interchanging (+ and ) and (2 and 4), we get,
(a) which is false.
(b) which is false
(c) which is false.
(d) which is true.
Hence, the answer is (d).
Choose the option having two signs that should be interchanged to make the following equations correct. ( 6 - 2) + ( 4 × 2 + 13) ÷ ( 7 - 2) = 20
| |||
| Right Option : A | |||
| View Explanation | |||
If 20 - 10 means 200, 8 | |||
| Right Option : A | |||
| View Explanation | |||
Which one of the four interchanges in signs and numbers would make the given equation correct? (3 | |||
| Right Option : A | |||
| View Explanation | |||
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