| Class VI |
Mathematics |
Ganita Prakash |
4 |
Classs 5 and 6? c. If 2 more girls were admitted in Class 2, how would the graph change? d. How many girls are there in Class 7? Ans. a. Class 8. b... |
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| Class VI |
Mathematics |
Ganita Prakash |
4 |
preferred to do in their free time. Draw a bar graph to illustrate the above data taking the scale of 1 unit length = 5 students. Which activity is... |
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| Class VI |
Mathematics |
Ganita Prakash |
4 |
in the graph. Can you find those mistakes and fix them? Ans. There are mistakes in the bars of 2006, 2010, 2014, 2018. Section 4.5 Page no. 103 Fig... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
5 PRIME TIME 5.1 Common Multiples and Common Factors Idli-Vada Game Children sit in a circle and play a game of numbers. One of the children starts... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
21 10 the ‘idli-vada’ game? 3 30 5 Hint: Imagine playing the game 24 9 15 25 till 30. Draw the figure if 12 20 the game is played till 60. 27 Commo... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
2, 3, 4, 6, 8, 12, 24 all divide 24 exactly. Recall that such numbers are called factors or divisors of 24. Grumpy increases the level of the game.... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
64 65 66 67 68 69 70 In the table, 1. Is there anything common among the shaded numbers? Math 2. Is there anything common among the circled Talk nu... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
to 10, except for 7. This 10. Find the smallest number that is a multiple of all the numbers from 1 to 10. Reprint 2026-27 Ganita Prakash | Grade 6... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
15, 16, 18, 20. Reprint 2026-27 Prime Time What about 1, which has only one factor? The number 1 is neither a prime nor a composite number. How man... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
it works. otherthan1,arecompositenumbers.This methodiscalledtheSieveofEratosthenes. This procedure can be carried on for numbers greater than 100 a... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
prime numbers up to 100. 7. Find seven consecutive composite numbers between 1 and 100. 8. Twin primes are pairs of primes having a difference of 2... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
9? Jumpy cannot reach both using any jump size other than 1. So, Grumpy knows that the pair 4 and 9 is safe. Check if these pairs are safe: a. 15 a... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
8 4 16 8 7 8 5 10 6 15 9 6 5 7 6 9 8 7 14 1312 1110 In some diagrams, the thread is tied to every peg. In some, it is not. Is it related to the two... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
more ways to factorise these numbers. But if we take any of the given factorisations, for example, 80 = 16 × 5 and 63 = 9 × 7, then there are no co... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
examples. By going through different ways of breaking down the number, we wrote 63 as 3 × 3 × 7 and as 3 × 7 × 3. Are they different? Not really! T... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
of 72 is? The prime factorisation of the original number is obtained by putting these together. 72 = 2 × 2 × 3 × 2 × 3 Reprint 2026-27 Ganita Praka... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
prime factors. Can we conclude that they are co-prime? Suppose they have a common factor that is composite. Would the prime factors of this composi... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
2 × 2 × 3 × 2 × 7 = 12 × 14 Therefore, 168 is divisible by 12. Example: Is 75 divisible by 21? Find the prime factorisations of both: 75 = 3 × 5 × ... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
the other? 4. Guna says, “An y two prime numbers are co-prime?”. Is he right? 5.5 Divisibility Tests Sofar,wehavebeenfindingfactorsofnumbersindiffe... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
10, 12, 14, 16, 18, 20, ... What do you observe? Do you see a pattern in the last digit? Reprint 2026-27 Ganita Prakash | Grade 6 Is 682 divisible ... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
Is 8536 divisible by 4? Consider these statements: 1. Only the last two digits matter when deciding if a given number is divisible by 4. 2. If the... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
are evenly divisible by 100 but not 400. a. From the year you were born till now, which years were leap years? b. From the year 2024 till 2099, how... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
special as it is the only multiple of 5”. • Yadnyikee says, “43 is special because it is the only prime number”. Radha says, “43 is special because... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
other than 1 and themselves. For example, 8 has the factor 4 and 9 has the factor 3, so 8 and 9 are both composite. Every number greater than 1 c... |
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| Class VI |
Mathematics |
Ganita Prakash |
5 |
till 30. Draw the figure if the game is played till 60. Ans. Yes, the common numbers represent the numbers when to say ‘idli-vada’. 1 Page no. 109 ... |
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