2 Views

Question : Directions: In the following question, you have to identify the correct response from the given premises stated according to the following symbols:
If – stands for +; + stands for × and × stands for –; then which one of the following equations is not correct?

Option 1: 22 + 7 – 3 × 9 = 148

Option 2: 33 × 5 – 10 + 20 = 228

Option 3: 7 + 28 – 3 × 52 = 127

Option 4: 44 – 9 + 6 × 11 = 87


Team Careers360 19th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 7 + 28 – 3 × 52 = 127


Solution : Given:
– stands for +; + stands for × and × stands for –.

Let's check the options –
First option: 22 + 7 – 3 × 9 = 148
On replacing ⇒ 22 × 7 + 3 – 9 = 148
Solving the L.H.S. of the equation –
= 22 × 7 + 3 – 9
= 154 + 3 – 9
= 157 – 9
= 148 = R.H.S.
Second option: 33 × 5 – 10 + 20 = 228
On replacing ⇒ 33 – 5 + 10 × 20 = 228
Solving the L.H.S. of the equation –
= 33 – 5 + 10 × 20
= 33 – 5 + 200
= 233 – 5
= 228 = R.H.S.
Third option : 7 + 28 – 3 × 52 = 127
On replacing ⇒ 7 × 28 + 3 – 52 = 127
Solving the L.H.S. of the equation –
= 7 × 28 + 3 – 52
= 196 + 3 – 52
= 199 – 52
= 147 ≠ 127
Fourth option: 44 – 9 + 6 × 11 = 87
On replacing ⇒ 44 + 9 × 6 – 11 = 87
Solving the L.H.S. of the equation –
= 44 + 9 × 6 – 11
= 44 + 54 – 11
= 98 – 11
= 87 = R.H.S.

So, only the third option doesn't satisfy the R.H.S. of the given equation. Hence, the third option is correct.

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books