Which two signs should be interchanged to make the…
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Question (English)
Which two signs should be interchanged to make the following equation correct?
$$18 - 23 \times 455 \div 7 + 28 = 377$$
- $\div$ and $-$
- $-$ and $+$
- $+$ and $\times$
- $-$ and $\times$ ✓ Correct
We need to interchange signs to satisfy the equation: $$18 - 23 \times 455 \div 7 + 28 = 377$$
Let's check the correct option: Interchanging $-$ and $\times$.
The new equation becomes: $$18 \times 23 - 455 \div 7 + 28$$
Now, apply the BODMAS rule (Bracket, Of, Division, Multiplication, Addition, Subtraction):
- Division: $$455 \div 7 = 65$$
Equation becomes: $$18 \times 23 - 65 + 28$$ - Multiplication: $$18 \times 23 = 414$$
Equation becomes: $$414 - 65 + 28$$ - Addition and Subtraction: $$414 - 65 = 349$$
$$349 + 28 = 377$$
Since $$377 = 377$$, the equation is correct.
प्रश्न (हिंदी)
निम्नलिखित समीकरण को सही बनाने के लिए किन दो चिन्हों को आपस में बदला जाना चाहिए?
$$18 - 23 \times 455 \div 7 + 28 = 377$$
- $\div$ और $-$
- $-$ और $+$
- $+$ और $\times$
- $-$ और $\times$ ✓
हमें समीकरण को संतुष्ट करने के लिए चिन्हों को बदलना होगा: $$18 - 23 \times 455 \div 7 + 28 = 377$$
आइए सही विकल्प की जाँच करें: $-$ और $\times$ को आपस में बदलना।
नया समीकरण बन जाता है: $$18 \times 23 - 455 \div 7 + 28$$
अब, BODMAS नियम (कोष्ठक, का, भाग, गुणा, जोड़, घटाव) लागू करें:
- भाग (Division): $$455 \div 7 = 65$$
समीकरण बन जाता है: $$18 \times 23 - 65 + 28$$ - गुणा (Multiplication): $$18 \times 23 = 414$$
समीकरण बन जाता है: $$414 - 65 + 28$$ - जोड़ और घटाव (Addition and Subtraction): $$414 - 65 = 349$$
$$349 + 28 = 377$$
चूँकि $$377 = 377$$, अतः समीकरण सही है।
📚 About this Topic — General Awareness
This multiple choice question is from General Awareness, General Intelligence and Reasoning (2024), General Intelligence and Reasoning (2024)-2, SSC CGL Tier-1 (PYQs). It has 4 options with a detailed explanation of the correct answer and is available in both English and Hindi (द्विभाषी). Practice more MCQs from General Awareness to strengthen your preparation.