To Think or Not to Think

[adilsaleem]

Neat stuff , absolutely amazing ... many of these puzzles took me more than hours to solve. here are a few more ... take your time but be the first

Which is correct:
The Second Millennium began on Jan 1 2000
The Second Millennium will begin on Jan 1 2001


Find the last digit of summation of the series:
199 + 299 + 399 + 499 + ……… + 9899 + 9999


Find the smallest number such that if its rightmost digit is placed at its left end, the new number so formed is precisely 50% larger than the original number.

 

[murthymsr]

Neat stuff , absolutely amazing ... many of these puzzles took me more than hours to solve. here are a few more ... take your time but be the first

Find the last digit of summation of the series:
199 + 299 + 399 + 499 + + 9899 + 9999

1, there are 99 terms, each ending with 9 .......

 

[adilsaleem]

Another classic

A girl goes into a shop to buy sweets. She uses a Re 1 coin and buys 40p worth of sweets. The shop assistant gives her two coins for his change.

One of them was not a 50p so how could the Girl have gotten her exact change?

 

[pkjha30]

Neat stuff , absolutely amazing ... many of these puzzles took me more than hours to solve. here are a few more ... take your time but be the first

Which is correct:
The Second Millennium began on Jan 1 2000
The Second Millennium will begin on Jan 1 2001

Third mellenium began on 1 Jan 2001.So both are wrong
Pankaj

 

[murthymsr]

Another classic

A girl goes into a shop to buy sweets. She uses a Re 1 coin and buys 40p worth of sweets. The shop assistant gives her two coins for his change.

One of them was not a 50p so how could the Girl have gotten her exact change?

yes, the other was!

 

[aca_trader]

1!+2!+3!+4!+5!+6!=1+2+6+24+120+720=873/7=124 remainder=5

Rest all factorials have 7 in them so fully divisible by 7 without remainder.

regards
pankaj

Very good once again. Me a dumboo

Best Regards,
--Ashish

 

[aad]

In Roman Numerals

MM = 2,000,000 * 1000=2,000,000,000

Pankaj

Thats a different way of thinking... nice... but he had said, digits... can we call << as digits ? Just curious....

Abhay (AAD)

 

[aca_trader]

Find the smallest number such that if its rightmost digit is placed at its left end, the new number so formed is precisely 50% larger than the original number.

285714

Best Regards,
--Ashish

 

[pkjha30]

Neat stuff , absolutely amazing ... many of these puzzles took me more than hours to solve. here are a few more ... take your time but be the first


Find the smallest number such that if its rightmost digit is placed at its left end, the new number so formed is precisely 50% larger than the original number.

answer is 285714

A little programme for you Adil, extract and run to get the answer

Pankaj

 

[pkjha30]

Thats a different way of thinking... nice... but he had said, digits... can we call << as digits ? Just curious....

Abhay (AAD)

Hi aad

Define digit

which number system you are using

binary
hexadcimal
octat
decimal or
Roman

Pankaj