ISEE upper Level Quantitative assist » Numbers and Operations » factors / Multiples » element Numbers » how to uncover out if a number is element

Explanation:

Every number other than 1 has at least two determinants - 1 and itself. So us are trying to find a number with no other factors - that is, a prime.

You are watching: All the prime numbers between 10 and 20

3 is a aspect of both 33 and also 39, and also 5 is a factor of 35, so us can eliminate those choices. Us cannot remove 37, since it is a prime, having only 1 and also 37 together factors.

Which is the greater quantity?

(a) The number of prime numbers in between 70 and 110

(b) The number of prime number between 80 and 120

Explanation:

The primes between 80 and 110 are had in both sets, so all we should do is to to compare the variety of primes between 70 and 80 and the number of primes between 110 and 120.

(a) The primes in between 70 and 80 room 71, 73, and 79 - 3 primes

(b) The only prime in between 110 and 120 is 113.

(a) is the higher quantity

Which is the higher quantity?

(a) The number of prime numbers between 1 and 20 inclusive

(b) The variety of composite numbers in between 21 and also 30 inclusive

Explanation:

(a) The prime numbers between 1 and 20 inclusive room 2, 3, 5, 7, 11, 13, 17, 19 - eight total.

(b) The prime numbers in between 21 and also 30 inclusive room 23 and also 29 - 2 prime numbers out of ten integers. This pipeline eight composite numbers.

(a) and (b) are therefore equal.

Which is the better quantity?

(a) The number of prime numbers in between 1 and also 20 inclusive

(b) The number of composite numbers between 1 and 20 inclusive

Explanation:

The prime numbers between 1 and also 20 inclusive space 2, 3, 5, 7, 11, 13, 17, 19 - eight total. Because 1 is neither prime nor composite, this pipeline 11 composite numbers. (b) is the greater quantity.

Which is the better quantity?

(a) The amount of the prime numbers in between 11 and 19 inclusive

(b) The sum of the composite numbers between 11 and 19 inclusive

Explanation:

(a) The element numbers in the 11-19 selection are 11, 13, 17, and also 19. Their sum:

(b) The composite numbers in the 11-19 range are 12, 14, 15, 16, and 18. Their sum:

(b) is greater.

Which quantity is greater?

(a) The number of composite numbers between 1 and also 1,000 inclusive.

(b) The number of even integers between 1 and 1,000 inclusive.

Explanation:

It is not vital to count every one of the composite numbers in the 1-1,000 range. Except for 2, every even number is composite, and there are an ext than one strange composite numbers (15, 25) to consist of for 2. This makes (a) greater.

Which is the better quantity?

(a) The number of primes in between 20 and also 50

(b) The variety of primes in between 10 and also 40

Explanation:

The primes between 20 and 40 are consisted of in both sets, so every we must do is to compare the variety of primes in between 40 and 50 v the variety of primes between 10 and 20.

(a) The primes in between 40 and 50 are 41, 43, and also 47 - three.

(b) The primes in between 10 and also 20 room 11, 13, 17, and 19 - four.

Since the number of primes in between 10 and 20 outnumbers those in between 40 and 50, the number of primes in between 10 and 40 outnumber those between 20 and 50. Therefore, (b) is the greater.

Indian institute of Technology, engineering in computer system Science, electrical Engineering. New York University, master in Busi...

See more: Let Your Light Shine Gospel Song Lyrics, Christian, Let Your Light Shine

Busan nationwide Univ Busan SKorea, Bachelors, Microbiology and also Biology education. Korea nationwide Univ of education S KOREA, Ma...
Statistics Tutors in Washington DC, MCAT Tutors in Philadelphia, Spanish Tutors in Phoenix, mathematics Tutors in Dallas ft Worth, ISEE Tutors in Dallas ft Worth, Calculus Tutors in Philadelphia, SSAT Tutors in Philadelphia, act Tutors in Los Angeles, GMAT Tutors in Los Angeles, GMAT Tutors in brand-new York City
LSAT courses & classes in brand-new York City, GRE courses & great in Miami, LSAT courses & class in Los Angeles, ISEE courses & classes in Houston, SSAT process & great in Philadelphia, SSAT courses & classes in brand-new York City, MCAT process & classes in Houston, SAT courses & great in Boston, GRE courses & classes in Washington DC, ACT courses & classes in new York City
LSAT test Prep in mountain Diego, GMAT check Prep in Seattle, GRE test Prep in Miami, GMAT test Prep in Los Angeles, MCAT test Prep in san Francisco-Bay Area, ACT check Prep in san Diego, GRE test Prep in Denver, LSAT test Prep in Los Angeles, ACT check Prep in Houston, SSAT test Prep in Atlanta
Report an concern with this inquiry

If you"ve found an concern with this question, please let us know. V the help of the neighborhood we can proceed to boost our education resources.

your Infringement an alert may it is in forwarded to the party that made the content easily accessible or to 3rd parties such together ChillingEffects.org.