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Numbers and Quantification — Important Questions

CBSE · Class 11 · Applied Mathematics

45 important questions from Numbers and Quantification for CBSE Class 11 Applied Mathematics, with answers. Includes multiple choice, multiple correct.

45 questions22 flashcards4 formulas & key relations5 concepts

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45 Questions·
multiple choicemultiple correcttext answer

Important Questions from Numbers and Quantification

1multiple correct

Using the Sieve of Eratosthenes method, which numbers would be eliminated when crossing out multiples of 2 from the list 1 to 20?

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4, 6, 8, 12

When using Sieve of Eratosthenes, after keeping 2 as prime, we eliminate all its multiples: 4, 6, 8, 10, 12, 14, 16, 18, 20. Among the options, 4, 6, 8, and 12 are multiples of 2. 3 and 15 are not multiples of 2.

2multiple choice

Convert 25 to binary.

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(11001)₂

25 ÷ 2 = 12 remainder 1; 12 ÷ 2 = 6 remainder 0; 6 ÷ 2 = 3 remainder 0; 3 ÷ 2 = 1 remainder 1; 1 ÷ 2 = 0 remainder 1. Reading remainders from bottom to top: (11001)₂. Check: 1×16 + 1×8 + 0×4 + 0×2 + 1×1 = 25.

3multiple choice

What is the complex conjugate of 2 - 5i?

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2 + 5i

The complex conjugate of a + bi is a - bi. For 2 - 5i, we change the sign of the imaginary part: 2 - (-5)i = 2 + 5i. The real part stays the same, only the imaginary part changes sign.

4multiple choice

Simplify log₂(8) + log₂(4).

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5

Using the property log(a) + log(b) = log(ab): log₂(8) + log₂(4) = log₂(8 × 4) = log₂(32). Since 2⁵ = 32, log₂(32) = 5. Alternatively: log₂(8) = 3, log₂(4) = 2, so 3 + 2 = 5.

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What are the important topics in Numbers and Quantification for CBSE Class 11 Applied Mathematics?
Key topics in Numbers and Quantification include Prime Numbers and Their Properties, RSA Cryptography and Applications, Binary Number System, Complex Numbers (Preliminary). Study these first, then practise questions on each for Class 11 exams.
How many important questions are there in Numbers and Quantification?
Super Tutor has 45 practice questions for Numbers and Quantification, including multiple choice, multiple correct, text answer questions. A sample with answers is on this page.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 11 Applied Mathematics Important Questions

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