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4c7 is added to 538 as shown below and the resultant number 7d5 is divisible by 9. 4 c 7 +5 3 8 7 d 5 If 7d5 is divisible by 9, then the sum of its digits should be divisible by 9. 7+d+5=12+d is divisible by 9. For 12 + d to be divisible by 9, the minimum value of d = 6. The other values are 15, 24... But since d is a single digit, these values are invalid. d = 6 and therefore d=c+2=6 c=4 d − c = 6 − 4 = 2
The current ages of Ashwin and Bhavin are in a 5:4 ratio. Ashwin's current age is 25% greater than Bhavin's. If the current average age of Ashwin, Bhavi...
Ayush's current age is 25% greater than Ayushi's, and the difference between their ages is 8 years. What will be the ratio of their ages 8 years from now?
Present average age of A, B and C together is 44 years. Age of B is 12 Years hence from now will be 260% more than age of A. Four years ago from now ...
Age of ‘A’ after 16 years will be three time of his age 12 years ago. Eight years hence from now, ratio of ages of ‘A’ and ‘B’ will be 2:3, ...
Present ages of P and Q are in the ratio 5:7 respectively. If Q’s age, 11 years hence from now will be 5 times of P’s age, 5 years ago from now, the...
The average age of 12 boys in a group is 8 years. If 3 more boys join the group, the average is increased by 1 year. What is the average age (in year...
The average of the present ages of A, B, C and D is (y-3) years. 12 years hence, the ratio between the ages of A and C is 9:8 respectively. Th...
Present age of Anil is 20% less than that of Bijender and 5 years hence from now, the ratio of Bijender and Shinu’s age will be 2 : 3 respectively. If...
Present ages of 'Amit' and 'Bishnu' are in the ratio 4:5, respectively. If seven years hence from now, the ratio of ages of 'Amit...
The sum of the ages of a father and his son is 60 years. 15 years ago, the father was five times as old as the son. What is the present age of the father?
