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In this chapter, we solve the expression while converting symbols with the actual mathematical characters of the mathematical expression into instructions.

In the examination, mathematical expressions are given with ‘+’, ‘-‘, ‘×’, ‘-‘ or “P” or “Q” or such other signals. The candidates have to solve the changed expression by changing the signs as per the instructions given in the question.


There is a very common rule in solving these types of questions, which is called the rule of BODMAS. This rule is used most of the questions in such queries. So let’s know this rule.

(i) B → Bracket
(ii) O → Of
(iii) D → Division
(iv) M → Multiplication
(v) A → Addition
(vi) S → Subtraction

This rule is called BODMAS Rule, in which we learn the order of solving mathematical expressions, that is, the first ‘Bracket’ again ‘Of’ again ‘of the division, then the’ multiplication of ‘, then’ addition and  ‘subtraction is used in end.

Let us now look at the equivalent questions of the questions in the examination on the basis of the above facts.

 

Example 1. If “+” means’ x ‘,’ – ‘means “+” and’ × means’ ÷ ‘, then

What will be the value of → 5 + 4 – 18×3?

(a) 26 (b) 14 (c) 34 (d) 6

Solution:
(a)
5 + 4 – 18 × 3
→ 5 × 4 + 18 ÷ 3

5 × 4 + 6 [first action is performed]
20 + 6 = 26 [multiplication by adding and multiplying is first.]

Example 2. If ‘K’ displays ‘÷’, “+” is displayed by “V” by ‘S’ and ‘x’ to “w” , Then what will be the value of 24 V 16 K 8W 6 S 9?
(a)
21 (b) 25 (c) 27 (d) 29

Solution: (c) Expression given = 24V 16K 8W 6S 9
According to the question, on changing the mathematical symbols, 24 + 16 ÷ 8 × 6 – 9

→ 24 + 12 – 9 = 36 – 9 = 27

 

Example 3. If the given answer in the given equation is to reach the answer given, then which option would be appropriate in the option,
31 4 2 1 = 30

(a) × ÷ × (b) – + ÷ (c) + – × (d) – ÷ +

Solution: (d)
31 – 4 ÷2 + 1
31 – 2 + 1 = 32 – 2 = 30

Objective type Questions, Notes for Govt Exams, current affairs, general knowledge, hindi objective questions, English objective questions, Mathematics objective Questions, Reasoning Objective Questions, study material for IBPS, study material for banks, study material for SSC, study material for DSSSB, Aptitude objective type Questions, Solved Question papers, Notes, Study Material, general knowledge questions and answers, gk questions and answers, hindi questions and answers, English questions and answers , mathematics questions and answers, reasoning questions and answers, current affairs questions and answers, general knowledge questions and answers for competitive Exams, gk questions and answers for competitive Exams, hindi questions and answers for competitive Exams, English questions and answers for competitive Exams, Mathematics questions and answers for competitive Exams, reasoning questions and answers for competitive Exams, current affairs questions and answers for competitive Exams, Railway jobs, banking job, corporate jobs, government jobs, govt jobs, private jobs, CPO, PCS, RRB, CDS, UPSC,Notes, Online Tests, practice sets, questions and answers with explanation for competitive examination, entrance test, Railway, IBPS, SSC, DSSSB, PCS, Banking for hindi, english, mathematics, reasoning, gk, current affairs and many more.





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