For the following questions answer them individually
The ratio of ages of A and B, four years ago, was $$7 : 5$$. The ratio of their ages, 6 years from now, will be $$19 : 15$$. What is the ratio of the present ages of A and B?
The value of $$\frac{5+2 of 3 \div3 of 2\times3}{9+72\div3-2\times(3-2)-3}$$ is $$\frac{a}{b}$$, where a and b are prime numbers. The value of $$(b - a)$$ is:
A wire encloses an area of 616 $$cm^2$$ when it is bent in the form of a circle. If the wire is bent in the form of a square, then its area (in $$cm^2$$) is very nearly equal to: (Take $$\pi = \frac{22}{7}$$)
What is the ratio of the mean proportional between 4.5 and 0.5, and the third proportional to 4.5 and 9.0?
The value of $$\left(5\frac{1}{4}\div\frac{3}{7} of \frac{1}{2}\right)\times \left(5\frac{1}{4}\times\frac{3}{7} \div\frac{1}{2}\right)\div \left(5\frac{1}{4}\div\frac{3}{7}\times \frac{1}{2}\right)$$ isÂ
Which plant tissue is responsible for transport of water and minerals from roots to the leaves ?
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