LCM of a set of numbers would be greater than or equal to the largest number in that set. HCF of a given set of numbers would be smaller than or equal to the smallest number in that set.

In area-velocity method generally the discharge measurements are made by keeping the boat stationary at the point of observation or vertical. Depth and velocity are measured by sculling the boat to this point.

A clock is an instrument to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell".

A number is a mathematical object used to count, label, and measure. In mathematics, the definition of number has been extended over the years to include such numbers as 0, negative numbers, rational numbers, irrational numbers, real numbers, and complex numbers.

A percentage is a portion of a whole expressed as a number between 0 and 100 rather than as a fraction. All of something is 100 percent, half of it is fifty percent, none of something is zero percent.

Permutation: An arrangement is called a Permutation. It is the rearrangement of objects or symbols into distinguishable sequences. When we set things in order, we say we have made an arrangement.

Age problems are a very popular type of algebra word problem. In age problems, you are given information so you can find the ages of the people in the problem.

Train problem moving in some direction with some speed. Problem solving interesting question realted to trains. Question related to speed , time and distance covered by train.

'Simple Interest' A quick method of calculating the interest charge on a loan. Simple interest is determined by multiplying the interest rate by the principal by the number of periods.

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