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Question : Directions: Which two signs should be interchanged to make the given equation correct?
17 + 10 × 5 ÷ 9 + 18 = 53

Option 1: + and ÷

Option 2:  + and ×

Option 3: + and –

Option 4: × and ÷


Team Careers360 17th Jan, 2024
Answer (1)
Team Careers360 23rd Jan, 2024

Correct Answer: × and ÷


Solution : Given:
17 + 10 × 5 ÷ 9 + 18 = 53

Let's check the options –
First option: + and ÷
In the given equation, two + signs are present, and it's unclear which one should be interchanged. So, this option is incorrect.

Second option: + and ×
In the given equation, two + signs are present, and it's unclear which one should be interchanged. So, this option is incorrect.

Third option: + and –
In the given equation, two + signs are present, and there is no – sign. So, this option is incorrect.
Fourth option: × and ÷
On interchanging the mathematical signs, we get –
= 17 + 10 ÷ 5 × 9 + 18
= 17 + 2 × 9 + 18
= 17 + 18 + 18
= 53

So, only the fourth option satisfies the given equation. Hence, the fourth option is correct.

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