Which of the following interchange of numbers and mathematical signs would make the given equation correct ?
28 ÷ 7 × 10 ÷ 5 - 20 = 5
Answer & explanation
Correct answer: option 4
Given equation; 28 + 07 x 10 ÷ 5 - 20 = 05
According to the que, after interchanging of numbers and mathematical signs;
So,
--> Option 01= 10 and 20, x and +
28 × 7 + 20 ÷ 5 - 10 = 5
28 × 7 + 4 - 10 = 5
196 + 4 - 10 = 5
200 - 10 = 5
190 \(\neq \)5 (LHS \(\neq \)RHS)
--> Option 02= 5 and 20, - and +
28 + 7 × 10 - 20 ÷ 5 = 20
28 + 7 × 10 - 4 = 20
28 + 70 - 4 = 20
98 - 4 = 20
94 \(\neq \)20 (LHS \(\neq \)RHS)
--> Option 03= 7 and 28, x and ÷
7 + 28 ÷ 10 × 5 - 20 = 5
7+2.8x5-20=5
7 + 14 - 20 = 5
18 - 20 = 5
-2 \(\neq \)5 (LHS \(\neq \)RHS)
--> Option 04= 5 and 10, + and ÷
28 ÷ 7 × 5 + 10 - 20 = 10
4 × 5 + 10 - 20 = 10
20 + 10 - 20 = 10
30 - 20 = 10
10 = 10 (LHS = RHS)