What will come in place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
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63 × 9 + 21 – 4 ÷ 5 = ?

Question

What will come in place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?  
\
63 × 9 + 21 – 4 ÷ 5 = ?

Accepted Answer

Given expression: 63 × 9 + 21 – 4 ÷ 5

Step 1: Interchange '+' and '–', and '×' and '÷'.
- '+' becomes '–'
- '–' becomes '+'
- '×' becomes '÷'
- '÷' becomes '×'

So the expression becomes:
63 ÷ 9 – 21 + 4 × 5

Step 2: Evaluate the expression following BODMAS (Brackets, Orders, Division/Multiplication, Addition/Subtraction):
- First division and multiplication from left to right:
  63 ÷ 9 = 7
  4 × 5 = 20

Now expression is:
7 – 21 + 20

Step 3: Perform addition and subtraction from left to right:
7 – 21 = -14
-14 + 20 = 6

Step 4: Re-check calculations:

Re-evaluate step 3:
7 – 21 + 20
= (7 – 21) + 20
= -14 + 20
= 6

So the result is 6, which corresponds to option 3.

Step 5: Check options again:
Options:
1. 4
2. 7
3. 6
4. 5

The correct answer is 6.

Therefore, the correct option is 3.

Answer

Answer

Answer