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Which prime factor is not included in the prime factorisation of (1260)?
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Answer and explanation
Correct answer: (11)
Step 1: Write (1260=126 \times 10). Step 2: (126=2 \times 3^2 \times 7) and (10=2 \times 5), so (1260=2^2 \times 3^2 \times 5 \times 7). It does not include (11). Step 3: Match the options with the prime factorisation.
Frequently asked questions
What is the correct answer to this question?
(11)
Why is this the correct answer?
Step 1: Write (1260=126 \times 10). Step 2: (126=2 \times 3^2 \times 7) and (10=2 \times 5), so (1260=2^2 \times 3^2 \times 5 \times 7). It does not include (11). Step 3: Match the options with the prime factorisation.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Prime Factorisation.
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