There are infinitely many pairs. An easy pair to remember is 1 and 189.
189
189
They are: 3*3*3*7 = 189
There are many possible answers. The simplest of these is 1 and 189.
(189,1)(63,3)(27,7)(21,9)
1 x 189, 3 x 63, 7 x 27, 9 x 21.
There are infinitely many possible answers. For example: 1*189 10*18.9 100*1.89 2*94.5
255
1 x 189, 3 x 63, 7 x 27, 9 x 21
The factor pairs of 189 are: 1 x 189 3 x 63 7 x 27 9 x 21
First, find two numbers that when multiplied together equal 189. I can tell by looking at the number that it is divisible by 9. Any number whose digits add up to a number divisible by 9 is also divisible by 9. 1 + 8 + 9 = 18, which is divisible by 9. 189 ÷ 9 is 21. So, the top of our factor tree is: 189 9 x 21 Now, determine two pairs of numbers that when multiplied together, one pair will equal 9 and the other pair will equal 21. 9 = 3 x 3 and 21 = 7 x 3. So, now our factor tree is: 189 9 x 21 (3x3) x (7x3) You would continue doing this until you no more numbers can be factored. Since 3 and 7 are prime numbers, the factor tree is finished. The factor tree shows that the prime factorization of 189 is 3 x 3 x 3 x 7 or 33 x 7.
The prime numbers (factors) of 189 are: 3 and 7