Download Aptitude Crack
img not found img not found

Problems on Numbers

Q1:

A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

A 18

B 24

C 42

D 81

ANS:B - 24

Let the ten's and unit digit be x and 8 respectively.
x
Then, 10x + 8 + 18 = 10 x 8 + x
x x
 10x2 + 8 + 18x = 80 + x2  9x2 + 18x - 72 = 0  x2 + 2x - 8 = 0  (x + 4)(x - 2) = 0  x = 2.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.