Of the three numbers, the first number is twice the second number and the second number is twice the third number. The average of reciprocal of these numbers is 7/72. The smallest of these numbers is what percent of LCM of these numbers?

The sum of three numbers is 98. If the ratio of the first to second is 2 :3 and that of the second to the third is 5 : 8, then the second number is:

Three numbers are in the ratio 3 : 4 : 5. The total of the largest and the smallest numbers is equal to the other number plus 52. Accordingly, which is the smallest number?

Two alloys are both made up of copper and tin. The ratio of copper and tin in the first alloy is 1 : 3 and in second alloy is 2 : 5. In what ratio should two alloys be mixed, to obtain a new alloy su…

A bag contains coins of Rs. 2, Re. 1 and 50 paisa in the ratio 6 : 7 : 15 respectively. If the total amount in the bag is Rs. 1590, then the number of 1 Re. coins in the bag is :

10 years ago the ratio of ages of Ramesh and Rajeev was 1 : 3. 5 years hence this ratio will become 2 : 3. What is the ratio of their ages at present?