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Which number is smaller?

• A

239,840,456

• B

2,239,845,499

Solution:
Consider the numbers: 239,840,456 and 2,239,845,499.

Observe that both numbers have an unequal number of digits.

That is, 239,840,456 has nine digits.

2,239,845,499 has ten digits.

Now, the number with less digits is smaller.

So, 239,840,456 < 2,239,845,499

That is, the number 239,840,456 is smaller than 2,239,845,499.