Elitmus Exam Numerical Ability Geometry

In a hotel there are 5 rooms which are square in shape. on their floor square tiles of size 1X1 are fitted. on the diagonals of the room black tiles are fitted and remaining are white. 101,111,121,131,141 these are the no. of black tiles of all five rooms. now find which No's of black tiles are not possible out of the given no?

Read Solution (Total 7)

Elitmus Other Question

a 4*4 matrix has 16 points. find the probability of making triangle from this points? how many 7 digit number are there having the digit 3 three times & the digit 5 four times?
a) 7!/(3!)(5!)
b) 3^3 * 5^5
c) 77
d) 35