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Start learning 50% faster. Sign in nowLCM (3, 10, 12, 15) = 60 60 = 2 × 2 × 3 × 5 Here, 3 and 5 occur only once, and we already have 2 in a pair. To make all prime factors in pairs, multiply by another 3 and 5. ⇒ 60 × 3 × 5 = 900 ∴ 900 is the least perfect square divisible by 3, 10, 12, and 15.
Twelve years hence, the ratio between the ages of C and E is 5:7 respectively. The present age of A is 25% less than that of D. Four years ago, the aver...
Present age of ‘K’ is 70% more than that of ‘L’. 10 years ago, ‘K’ was 2.2 times as old as ‘L’. Find the present age of ‘L’.
...The ratio of the present ages of father and his son is 9:4. The product of their ages 2 years ago was 34 times of his son’s age that year. What wa...
The sum of present ages of ‘Rahul’ and ‘Sneha’ is 48 years. The present age of ‘Sneha’ is half the age of ‘Tanya’ 4 years hence. If the ...
The age of person A (y+3) years ago and the age of person B (y+4) years from now are in the ratio 2:3.
It is also given th...
The age of 'P' five years from now will be equal to the age of 'Q' four years before now. Additionally, twice the current age of ...
Downstream speed of a boat is (8/7)th of the speed of the boat in still water. Find the time taken by the boat to cover 280 km downstream if it covers 2...
5 years ago from now, the ratio of age of 'A' and 'B' was 9:5, respectively and 5 years hence from now, the ratio of their ages will become 11:7. Find ...
