Question

1.
If the digits '5' and '8', signs '+' and 'x' are interchanged
on the left hand side in each option, then which of
the following becomes correct?
A. 5 + 8 x 2 = 22
B. 8 + 5 x 2 = 18
C 5* 8 + 2 = 42
D. 8 * 2 + 5 = 21

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Answer 1

Answer:

Option D is correct

Step-by-step explanation:

If we exchange 8 and 5 and sign + and × we get

5+2×8=5+16=21

Answer 2

Option D would become correct on interchanging the terms

1) The given 4 equations are:

A. 5 + 8 * 2 = 22

B. 8 + 5 * 2 = 18

C 5* 8 + 2 = 42

D. 8 * 2 + 5 = 21

2) Required changes = 5 and 8 , + and *

3) Interchanging the required terms

A. 8*5+2 =22

B. 5*8+2 =18

C. 8+5*2 =42

D. 5+2*8 = 21

4) Evaluating the expressions using BODMAS rule,

A. 40+2 =22

B. 40+2 =18

C. 8+10 =42

D. 5+16 = 21

5) Further evaluating and simplifying:

A. 42 ≠ 22

B. 42 ≠ 18

C. 18 ≠ 42

D. 21 = 21

6) Hence, only option D is correct