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Prime number

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by sanju09 » Fri Feb 12, 2010 5:13 am
mgmt_gmat wrote:How many prime numbers between 1 and 100 are factors of 7,150 ?
A. One
B. Two
C. Three
D. Four
E. Five
7150 = 2 × 5 × 5 ×11 ×13

Only [spoiler]four[/spoiler] primes in the range viz. 2, 5, 11, and 13.

[spoiler]D[/spoiler]
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by komal » Wed Feb 17, 2010 11:23 am
mgmt_gmat wrote:How many prime numbers between 1 and 100 are factors of 7,150 ?
A. One
B. Two
C. Three
D. Four
E. Five
7150 = 2*5*5*11*13

There are four prime numbers (2,5,11,13) between 1 and 100 that are factors of 7150.

(D) is correct
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