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The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 is
- a)1
- b)2
- c)3
- d)4
Correct answer is option 'D'. Can you explain this answer?
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The number of significant figures in all the given numbers 25.12, 2009...
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The number of significant figures in all the given numbers 25.12, 2009...
To determine the number of significant figures in a given number, we need to follow a few rules:
1. Non-zero digits are always significant. In the given numbers, the following non-zero digits are significant: 2, 5, 1, 2, 2, 1, 7.
2. Zeros between non-zero digits are significant. In the given numbers, the zero between 2 and 5 in 25.12 is significant.
3. Leading zeros (zeros before any non-zero digit) are not significant. In the given numbers, the leading zero in 2009 is not significant.
4. Trailing zeros (zeros after the last non-zero digit) are significant only if there is a decimal point. In the given numbers, the trailing zeros in 25.12 are significant because there is a decimal point.
Now let's analyze each given number:
1. 25.12: This number has four significant figures (2, 5, 1, 2).
2. 2009: This number has four significant figures (2, 0, 0, 9). The leading zero is not significant.
3. 4.156: This number has four significant figures (4, 1, 5, 6).
4. 1.217 x 10^-4: This number is in scientific notation. The significant figures are only in the coefficient part (1.217). Therefore, this number has four significant figures (1, 2, 1, 7).
In summary, all the given numbers have four significant figures. Therefore, the correct answer is option D) 4.
1. Non-zero digits are always significant. In the given numbers, the following non-zero digits are significant: 2, 5, 1, 2, 2, 1, 7.
2. Zeros between non-zero digits are significant. In the given numbers, the zero between 2 and 5 in 25.12 is significant.
3. Leading zeros (zeros before any non-zero digit) are not significant. In the given numbers, the leading zero in 2009 is not significant.
4. Trailing zeros (zeros after the last non-zero digit) are significant only if there is a decimal point. In the given numbers, the trailing zeros in 25.12 are significant because there is a decimal point.
Now let's analyze each given number:
1. 25.12: This number has four significant figures (2, 5, 1, 2).
2. 2009: This number has four significant figures (2, 0, 0, 9). The leading zero is not significant.
3. 4.156: This number has four significant figures (4, 1, 5, 6).
4. 1.217 x 10^-4: This number is in scientific notation. The significant figures are only in the coefficient part (1.217). Therefore, this number has four significant figures (1, 2, 1, 7).
In summary, all the given numbers have four significant figures. Therefore, the correct answer is option D) 4.
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The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 isa)1b)2c)3d)4Correct answer is option 'D'. Can you explain this answer?
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The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 isa)1b)2c)3d)4Correct answer is option 'D'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 isa)1b)2c)3d)4Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 isa)1b)2c)3d)4Correct answer is option 'D'. Can you explain this answer?.
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