Latest NDA Aptitude Question SOLUTION: If β
r
is perpendicular to both α r and γ r where kˆ = α r and kˆ 4 jˆ 3 iˆ γ = 2 + + r , then what is β
r
equal to
The essence of mathematics resides in its freedom.
Georg Cantor
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?