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2 years ago a mother was 4 times as old as her son. 6 years from now her age will become more than double her son’s age by 10 years. What is the present ratio of their ages?
2.56 ×(13)² = ?
2/3 of three-fourth of a number is :
2/5 ÷ 4/5 × 1/9 × 0 = ?
2+7
20 litres of mixture contains 3:2 ratio of milk and water. Calculate the quantity of water to be added to get the ratio as 1:3.
20 pens and 46 pencils were purchased for Rs. 235. If the average price of a pencil is Rs. 2.50 then calculate the average price (in Rs.) of a pen.
20 persons completed 1/3rd of the work in 12 days. How many more person are required to finish the rest work in next 12 days?
21 goats eat as much as 15 cows. How many goats eat as much as 35 cows?
21 mango trees, 42 apple trees and 56 orange trees have to be planted in rows such that each row contains the same numbers of trees of one variety only. Minimum number of row in which the trees may be planted is = ?