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Q: What is the greatest possible product of a 4 digit number and a 3 digit number?

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It is 891.

99x9999=989901

-2

You will get the greatest product if you choose the greatest possible numbers in both cases, i.e., 9 x 99.

9 times the number

891 is the largest.

Since the greatest digit is 9 and the greatest 2-digit number is 99, the product of them is 891.

2 digit number

Highest 2-digit number = 99 Highest 1-digit number = 9 Highest possible sum from 2, 2-digit numbers = 198 Highest possible sum from 2, 1-digit numbers = 18

999900

999999999999

Six.

98,901

99*999 = 98901

The greatest number is 7.

2

992

999

The greatest two-digit prime number is 97. The lowest two-digit prime number is 11. The product of the two numbers is equal to 1067.

99 x 9 = 891.

999,999,999,990

9999

998.

987654321

8*112