View Full Version : math Quiz-- ?Challenge
ranjitjat
June 12th, 2003, 09:38 PM
You got only 30 seconds - no cheating
Challenge-- Using mental arithmetic only.
What is prime numbers ?
Multiply frist six prime numbers with in 30 seconds. ans?
rinu
June 13th, 2003, 02:26 AM
uffffffffffffff, 1 min toh padhne mei hi lug gaya
............
yvsgaawar
June 13th, 2003, 02:57 AM
hahaha...
Rinu Singh (Jun 12, 2003 04:56 p.m.):
uffffffffffffff, 1 min toh padhne mei hi lug gaya
............
bnashier
June 13th, 2003, 03:06 AM
A prime number is a positive integer bigger than 1 that has no proper divisor - or
A prime number is a positive integer bigger than 1 whose only factors are 1 and the number itself.
Examples are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 and many more .... There are an infinite number of primes.
The product of the first five is 2310.
uday
June 13th, 2003, 09:51 AM
No's which can be divided by itself and factor1
first 6 no's mult. is 30030
time taken is 49 sec.
Dharmpal Singh Dudee (Jun 12, 2003 12:08 p.m.):
You got only 30 seconds - no cheating
Challenge-- Using mental arithmetic only.
What is prime numbers ?
Multiply frist six prime numbers with in 30 seconds. ans?
ranjitjat
June 13th, 2003, 10:02 PM
Rinu - very honest ans- full marks for honesty
No luck in wall st- stock market
ranjitjat
June 13th, 2003, 10:11 PM
Uday- well done 100 %
very nice try- 49 seconds is fine.
Budh ji- very nice try full marks in part one.
You only multiply 5 prime no- not six
2x3x5x7x11=2310x13=30030 net result.
may be time and wall st pressure.
Cheers
anilkc
June 13th, 2003, 11:28 PM
Why is 1 not a prime #?
rsdalal
June 14th, 2003, 12:34 AM
Because defination says it has be more than one and divisible by 1 and by itself only...
anil chaudhary (Jun 13, 2003 01:58 p.m.):
Why is 1 not a prime #?
rinu
June 14th, 2003, 03:36 AM
Thankyou ...........Uncle Ji,
Regards
RiNu
Dharmpal Singh Dudee (Jun 13, 2003 12:32 p.m.):
Rinu - very honest ans- full marks for honesty
No luck in wall st- stock market
bnashier
June 14th, 2003, 04:11 AM
Dharmpal Ji:
My honest oversight, I read 'five' instead of six. Wonder why - may be I was thinking of stocks! Only Five at a time!
While the product of the first six is 30030, that of the seven is 510510 and for first 8 is 9699690. Observe that these product numbers contain some interesting repetition of 'blocks'. 30-30, 510-510, 969-969 . This sort of imaging phenomenon ends right here - i.e. further products won't yield any repetition like this.
Regards,
Budh
ranjitjat
June 14th, 2003, 02:42 PM
Budh ji
thank you for defination.
full marks in honesty as well.
We are coming to USA next month to get some personal tuition from you in stock market. inside dealings and investment in general.
speak to you soon.
with best wishes & greetings from London
Dharmpal
bnashier
June 14th, 2003, 05:24 PM
Dharmpal Ji:
It will be my delight to host you here in Florida. Please let me know when do I expect you !
Warm Regards,
Budh
Dharmpal Singh Dudee (Jun 14, 2003 05:12 a.m.):
Budh ji
thank you for defination.
full marks in honesty as well.
We are coming to USA next month to get some personal tuition from you in stock market. inside dealings and investment in general.
speak to you soon.
with best wishes & greetings from London
Dharmpal
ranjitjat
June 15th, 2003, 04:55 PM
Bhud ji
Thank you very much for such a warmhearted invitation.
I am coming nest month closer to you in Lexington Ky to visit family .
In fact our family is visiting Disney world now- today.
I will speak to you soon.
with best wishes & greetings from London.
Dharmpal