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If you want only whole numbers, and they are all different, then:
1 × 2 × 5 × 9 = 90
Otherwise, with whole numbers which are not all different:
1 × 1 × 1 × 90 = 90
1 × 1 × 2 × 45 = 90
1 × 1 × 3 × 30 = 90
1 × 1 × 5 × 18 = 90
1 × 1 × 6 × 15 = 90
1 × 1 × 9 × 10 = 90
1 × 2 × 3 × 15 = 90
1 × 2 × 5 × 9 = 90
1 × 3 × 3 × 10 = 90
1 × 3 × 5 × 6 = 90
2 × 3 × 3 × 5 = 90
Once you start allowing fractions, there are infinitely many such 4 number combinations, eg
½ × 2 × 9 × 10
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What two numbers multiplied by each other equal 3136?
56
What two numbers multiplied by each other equal 0?
The only number that, when multiplied by itself is 0, is 0
What two numbers multiplied by each other equal 999999?
333,333 and 3
What two numbers multiplied by each other equal 52 and added to each other equal 15.2?
67.2
What 3 numbers equals 160?
The three numbers that equal 160 are 40, 40, and 80. This is because when you add 40 + 40 + 80, you get 160. These numbers are multiples of each other, with 40 being a factor of 80 and both 40 and 80 being factors of 160.
