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Which sequence is formed by subtracting (3) each time?कौन सा क्रम हर बार (3) घटाकर बनाया गया है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (18, 15, 12, 9)(18, 15, 12, 9)
In the sequence (18, 15, 12, 9), the differences between consecutive terms are 15−18 = −3, 12−15 = −3, and 9−12 = −3. Hence, 3 is subtracted each time. In option B, 4 is subtracted each time, so it is not correct. Exam tip: Subtract consecutive terms to check the common difference.क्रम (18, 15, 12, 9) में क्रमागत पदों का अंतर 15−18 = −3, 12−15 = −3 और 9−12 = −3 है। इसलिए हर बार 3 घटाया गया है। विकल्प B में हर बार 4 घटता है, इसलिए वह सही नहीं है। परीक्षा टिप: क्रमागत दो पदों को घटाकर समान अंतर जाँचें।
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