Class 6

Math

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Playing With Numbers

Write the factors of each of the following numbers: 24 (ii) 64 (iii) 144

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Without performing actual addition and division write the quotient when the sum of 79 and 97 is divided by 16 (ii) 11.

If $98215x2$ is a number with $x$ as its tens digit such that it is divisible by 4. Find all possible values of $x$ .

I am the smallest number, having four different prime factors. Can you find me?

Which of the following numbers are divisible by 21? 21063 (ii) 20163

Find the possible missing twins for the following numbers so that they become twin primes: 29 (ii) 89 (iii) 101

Find the LCM of 12 and 18

A list consists of the following pairs of numbers: 51, 53; 55,57; 59,61; 63,65; 67,69; 71,73 Categorize them as pairs of: co-primes (ii) primes (iii) composites

Determine the greatest 3-digit number exactly divisible by 8, 10 and 12. and 6 ,8 and 10