catswift

6 Questions
2 Answers

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6

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among 3 digit numbers, how many numbers are there with exactly 9 factors? help

among 3 digit numbers, how many numbers are there with exactly 9 factors?
i know 2^8 is an option

catswift Sep 18, 2024

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243

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+32

help please

a,b,c,d,e and f are positive numbers such that bcdef/a=4, acdef/b=9, abdef/c=16,abcef/d=1/4, abcdf/e=1/9,abcde/f=1/16. Then (a+c+e)-(b+d+f)=_____

catswift Jun 25, 2022

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305

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+32

question on a math competition, i know the answer, i don't know how to get to it

A stack contains 7 green marbles and 3 red marbles. 2 marbles are taken from the sack w/out replacement. What is the probability of taking one green marble and one red marble (in any order)?

catswift May 9, 2022

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299

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+32

pls help

Ben chooses a random integer between and inclusive, twice (and he may choose the same integer both times). What is the probability that at least one of the numbers Ben chooses is a multiple of ?

catswift May 5, 2022

+1

344

3

+32

Hii, I'm stuck on this

Ten distinct points are chosen on a circle. A line segment is drawn between every pair of chosen points. How many line segments are drawn?
Please help!!

Melody ●●●

catswift Apr 22, 2022

+1

308

6

+32

im stuck on this :((

I run a book club with people, not including myself. Every day, for days, I invite three members in the club to review a book. What is the smallest positive integer so that I can avoid ever having the exact same group read more ..

●●●●●●

catswift Apr 13, 2022

+32

+2

thank you so much melody!!!

catswiftApr 23, 2022

+32

+1

thanks, both of you!!

catswiftApr 13, 2022