Algebraic Operations MCQs

श्रेणी: Reasoning | विषय: General Intelligence and Reasoning | टॉपिक: Algebraic Operations

2 प्रश्न

General Intelligence and Reasoning • Algebraic Operations

यदि a + b = 20 और a − b = 6 है, तो a × b का मान क्या होगा? If a + b = 20 and a − b = 6, then what is a × b?

A. 64 64 B. 100 100 C. 96 96 D. 91 91

सही उत्तर: D Correct Answer: D

दोनों समीकरणों को जोड़ने पर 2a = 26, इसलिए a = 13। तब b = 20 − 13 = 7। अतः a × b = 13 × 7 = 91।

Adding the equations gives 2a = 26, so a = 13. Then b = 20 − 13 = 7. Therefore, a × b = 13 × 7 = 91.

General Intelligence and Reasoning • Algebraic Operations

यदि 3x + 7 = 28 है, तो x का मान ज्ञात कीजिए। If 3x + 7 = 28, find x.

A. 7 7 B. 6 6 C. 5 5 D. 8 8

सही उत्तर: A Correct Answer: A

3x + 7 = 28 से 3x = 21। इसलिए x = 21/3 = 7।

From 3x + 7 = 28, we get 3x = 21. Therefore, x = 7.

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