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If A means +, B means тИТ, C means ├Ч, D means ├╖, then what will come in place of the question mark (?) in the following equation? 18┬аD┬а2┬аA┬а4┬аC┬а5┬аB┬а15=?
16
14
12
18
14
Substitute the symbols according to the given rules first: A = +, B = -, C = x, D = /. Then apply the standard BODMAS rule (Division тЖТ Multiplication тЖТ Addition тЖТ Subtraction) to evaluate the expression.
Substitute the symbols according to the given rules first: A = +, B = -, C = x, D = /. Then apply the standard BODMAS rule (Division тЖТ Multiplication тЖТ Addition тЖТ Subtraction) to evaluate the expression.
Step 1: Substitute the symbols
Replace each letter in the equation '18 D 2 A 4 C 5 B 15' with its corresponding arithmetic operator: D becomes /, A becomes +, C becomes x, and B becomes -. The expression becomes: 18 / 2 + 4 x 5 - 15.
Step 2: Apply BODMAS Rule (Division and Multiplication)
First, perform division: 18 / 2 = 9. Next, perform multiplication: 4 x 5 = 20. The expression simplifies to: 9 + 20 - 15.
Step 3: Perform Addition and Subtraction
Add 9 and 20 to get 29. Finally, subtract 15: 29 - 15 = 14.
A: 16 is incorrect because arithmetic error in intermediate addition or multiplication leads to a mismatch. C: 12 is incorrect as it results from improper order of operations. D: 18 is incorrect as it does not match the final calculated value.
B is correct because replacing the letters with their respective operators (18 / 2 + 4 x 5 - 15) and solving via BODMAS yields 9 + 20 - 15 = 14.
Always write down the substituted expression clearly before applying BODMAS to avoid sign confusion and calculation mistakes in railway and SSC exams.
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