less than 10,000 => less than 5 digits.
1) 4 digits series
-------------
210 = 2*3*5*7 ... total 24 ways
210 = 1*6*5*7 ... total 24 ways
2) 3 digits series
----------
6 * 5 * 7 .. total 6 ways.
total = 24+24+6 = 54 ways
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Combination problem?
Source: Beat The GMAT — Problem Solving |
I think this is a very poorly written question. It does not convey what its trying to ask.GHong14 wrote:How many integers less than 10,000 are a product of 210.
a.51
b.52
c.53
d.54
e.55
