Download Aptitude Crack
img not found img not found

Problems on Numbers

Q1: In a two-digit, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is:

A 24

B 26

C 42

D 46

ANS:A - 24

Let the ten's digit be x. Then, unit's digit = x + 2. Number = 10x + (x + 2) = 11x + 2. Sum of digits = x + (x + 2) = 2x + 2.  (11x + 2)(2x + 2) = 144  22x2 + 26x - 140 = 0  11x2 + 13x - 70 = 0  (x - 2)(11x + 35) = 0  x = 2. Hence, required number = 11x + 2 = 24.



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.