Question

How many 1000,s 100s,10000 10and 1 should be added to get largest 4 digit number?

Answer 1

9 = 1000s

9 = 100s

9 = 10s

9 = 1s

1000*9 = 9000

100*9 = 900

10*9 = 90

1*9 = 9

And , Finally adding all we will get the largest 4 digit number , i.e. 9999

9000+900+90+9 = 9999

Answer 2

We need to add nine 1000s, nine 100s, nine 10s, and nine 1s to get the largest four-digit number.

• The largest four-digit number can be obtained by substituting the greatest digit i.e 9 in all places (thousands, hundreds, tens, and ones).
• Hence, the greatest four-digit number is 9999.
• We can write

         9999 = 9000+900+99+9 = (9x1000) + (9x1000) + (9x1000)

• We observe that The number of:

        1000s = 9

        100s = 9  

        10s = 9

        1s = 9

• Hence, we need to add nine 1000s, nine 100s, nine 10s, and nine 1s to get the largest four-digit number.

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