Question

question#7
take your time

Answer 1

after express \[2^{29}\] there are 9 different digits
which number doen't exist in these 9 digits (solve without using calculator)

credit: passer-by

Answer 2

what do you mean which number ?

Answer 3

1-9 which one doesn't exist in those 9 digits

Answer 4

lol 4.

Answer 5

no calculator!!! LOL

Answer 6

7 or 9

Answer 7

I didn't used calculator, I know what is \( 2^{14} \) ,\( 2^{15} \) and one line multiplication.

Answer 8

oh sorry for misunderstanding

Answer 9

but i check by using calculator LOL
4 is CORRECT!

Answer 10

you want me try it analytically ?

Answer 11

plz do

Answer 12

But your problem is not stated correctly , the actually problem that I know is of the form:

\( 2^{29}\), expressed in base 10, is a nine-digit number. All nine of its digits are different. Find the digit that is missing without explicitly calculating \( 2^{29} \)

Answer 13

oh I see. it's problem translating

Answer 14

Haha.. this question has got me curious. Could someone please explain how to get the answer?