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Question 11 - Figure it out - Page 114, 115 - Chapter 5 Class 6 - Prime Time (Ganita Prakash)
Last updated at August 14, 2026 by Teachoo
Class 6 (Ganita Prakash & Old NCERT)
Chapter 5 Class 6 - Prime Time (Ganita Prakash)
- Factors and Multiples
- Common Multiples
- Common Factors
- Idli Vada Game
- Jumpy Jackpot
- Figure it out - Page 110, 111
- Prime Numbers
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Figure it out - Page 114, 115
- Co-prime numbers (and art)
- Prime Factorisation
- Uses of Prime Factorisation
- Divisibility Tests
- Figure it out - Page 125, 126
- Fun with numbers
- Teachoo Questions - MCQs
- Teachoo Questions - Mix
- Teachoo Questions - Assertion Reasoning
- Teachoo Questions - Case Based
Transcript
Question 11 How many three-digit prime numbers can you make using each of 2, 4 and 5 once?All possible 3 digit numbers using 2, 4 and 5 once are Ending with 2 – 452, 542 Ending with 4 – 254, 524 Ending with 5 – 245, 425 Now, we note that Numbers ending with 2 and 4 are divisible by 2 Numbers ending with 5 are divisible by 5 Thus, all of these numbers have either 2 or 5 as a factor, which means it has more than 2 factors.. ∴ There is 0 three-digit prime numbers that can be made.
