Which two signs and two numbers should be interchanged in the equation given below to make the following equation correct?
10 + 4 - 5 × 2 = 19
Show answer & explanation
Correct answer: C
Explanation
Given:
10 + 4 − 5 × 2 = 19
Try interchanging + and ×, and 4 and 2
New equation:
10 × 2 − 5 + 4
Solve according to the ‘BODMAS rule’:
= 20 − 5 + 4
= 15 + 4
= 19
All other interchanges do not give 19, hence they are incorrect.
Hence, the correct answer is option 3.