What must be added to the numbers 6,10,14 and 22 so that they are in proportion?

What percent of 8₹ is 50 paise?

Describe how the following expressions are obtained:$(i) 7 x y+5, (ii) x^{2} y, (iii) 4 x^{2}-5 x$.

What are sedimentary rocks?

What is the meaning of congruent?

I can't understand about cockroaches respiration

$\frac{1}{2}$ is subtracted from a number and the difference is multiplied by 4. If 25 is added to the product and the sum is divided by 3, the result is equal to 10. Find the number.

A number is doubled and 9 is added. If the result is trebled it becomes 75. What is that number?

Divide 690 in the ratio 2:3:5.

Find the reciprocal of $\frac{13}{3}$.

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