Indian Navy 10+2 B.Tech Cadet Real Numbers — practice questions

Explore 6 free Real Numbers questions in Indian Navy 10+2 B.Tech Cadet Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Real Numbers questions and exercises with answers

Showing questions 1–6 of 6.

Which of the following is an irrational number?Read the answer and worked solution →CLASS10 · Mathematics · HCF & LCM PairsRead the answer and worked solution →Key in the numberRead the answer and worked solution →Prime or composite?Read the answer and worked solution →True or false: real numbersRead the answer and worked solution →Which one does NOT belong?Read the answer and worked solution →

Worked practice questions

Which of the following is an irrational number?

0.333…
√5
22/7
3.14

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Correct answer: B. √5

√5 cannot be written as p/q with integer p, q. **The other three are rational:** 22/7 by construction, 3.14 = 314/100, and 0.333… = 1/3.

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CLASS10 · Mathematics · HCF & LCM Pairs

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Matching pairs

Left
HCF(12, 18)
Right
6
Left
HCF(24, 36)
Right
12
Left
HCF(15, 25)
Right
5
Left
LCM(4, 6)
Right
12
Left
LCM(8, 12)
Right
24
Left
LCM(9, 12)
Right
36

Instructions

Match each HCF / LCM expression to its value.

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Key in the number

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Questions

Answer
4
Question
What is the HCF of 96 and 404?
Answer
360
Question
What is the LCM of 6, 72 and 120?
Answer
11
Question
Write 253 as a product of two primes. What is the smaller prime?
Answer
9696
Question
The HCF of two numbers is 4 and their product is 38784. What is their LCM?

Instructions

Work out each answer and key it in on the pad.

_Source: syllabus Maths Ch1 Real Numbers, 1.2 The Fundamental Theorem of Arithmetic_