Aptitude ➤ Problems On Numbers ➤ 1

In this section, questions involving a set of numbers are put in the form of a puzzle. You have to analyze the given conditions, assume the unknown numbers and form equations accordingly, which on solving yield the unknown numbers.

Question 11
Q11.  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 :
Question 12
Q12.  Sum of three numbers 264, If the first number be twice then second and third number be one third of the first, then the second number is ?
Question 13
Q13.  What is the sum of two consecutive even numbers, the difference of whose squares is 84 ?
Question 14
Q14.  The product of two numbers is 120 and the sum of their squares is 289. The sum of the number is :
Question 15
Q15.  The product of two numbers is 9375 and the quotient, when the larger one is divided by the smaller, is 15. The sum of the numbers is :