Elitmus
Exam
Category
yesterday quetion.......
A square of side 5 is given. Joining the mid point of the sides another square is made and is continued so on. What will be the perimeter of the the 9th square ?
A.
sqrt2 5/4
B.
5/4
C.
5/8
D.
20 sqrt2
Read Solution (Total 2)
-
- side of every square will be 1/sqrt2 times of previous square.
So side of 9th square=5*(1/sqrt2)^8=5/16
perimeter=4a=4*5/16=5/4, hence ans is b) 5/4 - 9 years agoHelpfull: Yes(11) No(0)
- Answer wud be B
After 1st iteration -> 5/sqrt(2) -> 5/|2 -> 5/2 -> 5/2|2 ... - 9 years agoHelpfull: Yes(0) No(1)
Elitmus Other Question
yesterday question ........
.. Find the number of ways you can fill a 3x3 grid (with 4 corners defined as a,b,c,d) if you have 3 white marbles and 6 black marbles...
.....A. 9 C 3
....B. 6 C 3
.......C. 9 C 3 + 6 C 3
.....D. (9 C 3) + (6 C 3)/3!
A Man would like to take a new health insurance.An officer taking care of these matters says to the man: "Please tell me how many children you have". The Man answers : "I have three of them ." The officer :"What are the ages of the children?" The Man answers :"The product of the ages is equal to 36." The officer replies:"This is not enough information Sir!!" ; The Man replied"Sorry that I was a little bit unclear, but the sum of the ages is equal to the number of shops in front of your office." The officer:"This still is not enough information Sir!"; The man replies :"My oldest child loves chocoalate." The officer:"Thanks for your cooperation, I now know the ages".
Are you a smart officer? Then what are the ages of the children.
A.1, 4, 9
B.2, 2, 9
C.1, 3, 12
D.2, 3, 6