Question

3) Which two signs are to be interchanged to make the equation below true?
3 - 9 x 27 + 9-3 = 15​

Answer 1

Answer:

(3-9+27+9-3=1)×and+should change to +and-respective

Answer 2

Answer:

- and +

Step-by-step explanation:

• The given equation is 3 - 9 x 27 + 9 - 3 = 15​
• If we change two signs, the RHS should still be 15.
• Only then will the equation be true.
• The equation becomes 3 + 9 X 27 + 9 - 3 = 9 + 9 - 3 = 18 - 3 = 15 if the signs + and - are switched.
• We can ascertain the veracity of the supplied propositions using mathematical reasoning, often known as the mathematical reasoning principle.

• Most competitive exams, including JEE, have these reasoning statements, and the questions are quite simple and enjoyable to answer.

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