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Numbers and Quantification

CBSE · Class 11 · Applied Mathematics

Most important questions from Numbers and Quantification for CBSE Class 11 Applied Mathematics board exam 2026. MCQs, short answer, and long answer questions with marks.

45 questions22 flashcards5 concepts

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45 Questions·
multiple choicemultiple correcttext answer

Sample Questions

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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Frequently Asked Questions

What are the important topics in Numbers and Quantification for CBSE Class 11 Applied Mathematics?
Numbers and Quantification covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Numbers and Quantification — CBSE Class 11 Applied Mathematics?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Numbers and Quantification?
There are 45 practice questions available for Numbers and Quantification. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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All 12 chapters — CBSE Class 11 Applied Mathematics Important Questions

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