Question
Download Solution PDFWhich two numbers (not digits) given in the options need to be interchanged to balance the given equation?
77 ÷ 7 − 2 × 3 + 3 = 4
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven statement : 77 ÷ 7 − 2 × 3 + 3 = 4
According to the question, after interchanging the numbers :
So,
- Option - (1) : 3 and 77
77 ÷ 7 − 2 × 3 + 3 = 4 ⇒ 3 ÷ 7 − 2 × 77 + 3 = 4
0.42 − 2 × 77 + 3 = 4
0.42 + 3 - 154 = 4
3.42 - 154 = 4
-150.58 ≠ 4 (LHS ≠ RHS)
- Option - (2) : 3 and 7
77 ÷ 7 − 2 × 3 + 3 = 4 ⇒ 77 ÷ 3 − 2 × 7 + 3 = 4
25.67 − 2 × 7 + 3 = 4
25.67 + 3 - 14 = 4
28.67 - 14 = 4
14.67 ≠ 4 (LHS ≠ RHS)
- Option - (3) : 2 and 4
77 ÷ 7 − 2 × 3 + 3 = 4 ⇒ 77 ÷ 7 − 4 × 3 + 3 = 2
11 − 4 × 3 + 3 = 2
11 + 3 - 12 = 2
14 - 12 = 2
2 = 2 (LHS = RHS)
- Option - (4) : 2 and 7
77 ÷ 7 − 2 × 3 + 3 = 4 ⇒ 77 ÷ 2 − 7 × 3 + 3 = 4
38.5 − 7 × 3 + 3 = 4
38.5 + 3 - 21 = 4
35.5 - 21 = 4
14.5 ≠ 4 (LHS ≠ RHS)
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