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All Questions and Answers

161 Qs

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$24$.

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$15$.

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$21$.

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$27$.

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$12$.

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$20$.

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$18$.

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$23$.

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$36$.

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The sum of three odd numbers is even.

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The sum of two odd numbers and one even number is even.

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The product of three odd numbers is odd.

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If an even number is divided by $2$, the quotient is always odd.

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All prime numbers are odd.

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Prime numbers do not have any factors.

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Sum of two prime numbers is always even.

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$2$ is the only even prime number.

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All even numbers are composite numbers.

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The product of two even numbers is always even.

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$44$.

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$36$.

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$24$.

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$18$.

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(a) $23$

(b) $51$

(c) $37$

(d) $26$.

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$21$.

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$31$.

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$53$.

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$61$.

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A number which has only two factors is called a _______.

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A number which has more than two factors is called a _______.

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$1$ is neither __________ nor _________.

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The smallest prime number is _______.

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The smallest composite number is _______.

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The smallest even number is ________.

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Number | Divisible by | ||||||||

2 | 3 | 4 | 5 | 6 | 8 | 9 | 10 | 11 | |

128 | Yes | No | Yes | No | No | Yes | No | No | No |

990 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

1586 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

275 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

6686 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

639210 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

429714 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

2856 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

3060 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

406839 | ... | ... | ... | ... | ... | ... | ... | ... | ... |

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$572$.

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$726352$.

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$5500$.

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$6000$.

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$12159$.

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$14560$.

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$21084$.

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$31795072$.

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$1700$.

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$2150$.

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$297144$.

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$1258$.

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$4335$.

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$61233$.

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$901352$.

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$438750$.

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$1790184$.

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$639210$.

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$17852$.

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$12583$.

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$5445$.

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$10824$.

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$7138965$.

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$70169308$.

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$10000001$.

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$901153$.

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$92$____$389$.

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$8$___$9484$.

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_$6724$.

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$4765$_$2$.

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$18$ and $35$.

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$15$ and $37$.

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$30$ and $415$.

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$17$ and $68$.

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$216$ and $215$.

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$81$ and $16$.

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If a number is divisible by $3$, it must be divisible by $9$.

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If a number is divisible by $9$, it must be divisible by $3$.

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A number is divisible by $18$, if it is divisible by both $3$ and $6$.

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If a number is divisible by $9$ and $10$ both, then it must be divisible by $90$.

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If two numbers are co-primes, at least one of them must be prime.

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All numbers which are divisible by $4$ must also be divisible by $8$.

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All numbers which are divisible by $8$ must also be divisible by $4$.

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If a number exactly divides two numbers separately, it must exactly divide their sum.

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If a number exactly divides the sum of two numbers, it must exactly divide the two numbers separately.

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$24=2×3×4$.

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$56=7×2×2×2$.

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$70=2×5×7$.

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$54=2×3×9$.

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$24$ and $36$.

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$15,25$ and $30$.

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$8$ and $12$.

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$12,16$ and $28$.

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$18,48$.

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$30$, $42$.

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$18$, $60$.

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$27,63$.

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$36,84$.

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$34,102$.

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$70,105,175$.

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$91,112,49$.

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$18,54,81$.

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$12,45,75$.

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$9$ and $4$

Observe a common property in the obtained LCMs. Is LCM the product of two numbers?

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$12$ and $5$

Observe a common property in the obtained LCMs. Is LCM the product of two numbers?

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$6$ and $5$.

Observe a common property in the obtained LCMs. Is LCM the product of two numbers?

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$15$ and $4$

Observe a common properly in the obtained LCMs. Is LCM the product of two numbers?

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$5,20$

What do you observe in the results obtained?

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$6,18$

What do you observe in the results obtained?

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$12,48$

What do you observe in the results obtained?

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$9,45$

What do you observe in the results obtained?

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