other govt exam India Post Postman & Mail Guard Mock Test 2020 Quantitative Aptitude Simplification

निम्नलिखित प्रश्नों में प्रश्नवाचक चिन्ह (?) के स्थान पर क्या आना चाहिए?

9 – (? – 11) + (12)2 = 143

1
31
2
11
3
24
4
21
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