Class 6

Math

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Playing With Numbers

Determine prime factorization of 20570

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Find first three common multiples of 6 and 8.

Using divisibility tests, determine which of the following numbers are divisible by 2;by 3; by 4; by 5; by 6; by 8; by 9; by 10 ; by 11 (say, yes or no):

What is the HCF of two consecutive(a) numbers? (b) even numbers? (c) odd numbers?

Factorize 234 into prime factors.

If $x$ denotes the digit at hundreds place of the number $67x19$ such that the number is divisible by 11. Find all possible values of $x$ .

If $x$ is a digit of the number $66784x$ such that it is divisible by 9. find possible values of $x$ .

Using divisibility tests, determine which of the following numbers are divisible by 4; by 8:(a) 572 (b) 726352 (c) 5500 (d) 6000 (e) 12159(f) 14560 (g) 21084 (h) 31795072 (i) 1700 (j) 2150

Without performing actual division, find the remainder when 28735429 is divided by 11.