Class 6

Math

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Playing With Numbers

Write seven consecutive composite numbers less than 100 so that there is no prime number between them.

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If $2a25$ is a multiple of 9, where a is digit, what is the values of $a$ ?

Find the remainder when 981547 is divided by 5. Do this without doing actual division.

Express each of the following numbers as the sum of twin primes: 36 (ii) 84 (iii) 120

Find the values of the letters and give reasons for the steps involved. $AB×5=CAB$

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

Let $n$ be a natural number. If the division n $÷2$ leaves a remaineder of 1, what might be the units digit of $n$ ?

Find the values of the letters and give reasons for the steps involved. $A1+1B=B0$