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Study Material and Tips

### Tips to Solve Problems on Clocks

The face or dial of a watch is a circle whose circumference is divided into 6 equal parts, called minute spaces. A clock has two hands, the smaller one is called the hour hand or short hand while the larger one is called the minute hand or long hand. (i). In 60 minutes, the minute hand gains 55 minutes on the hour on the hour hand. (ii). In every hou...

### Tips to Solve Problems on Average

1. Average = 2. Suppose a man covers a certain distance x kmph and an equal distance at y kmph. Then, the average speed during the whole journey isKmph...

### List of World's Important Days

World's Important Days or International Days are days to observe issue of world's concern and interest. These international days are days used by the world community to commemorate, promote and mobilize for certain action. January January 1 : International Day of Peace (World Peace Day) January 1 : Global Family Day January 5 &...

### Tips to Solve Problems on Calender

I. Odd Days : In a given period , the number of days more than the complete weeks are called odd days. II. Leap Year : (i) Every year divisible by 4 is a leap year, if it is not a century. (ii) Every 4th century is a leap year and no other century is a leap year. Note : A leap year has 366 days. Examples : (i) Each ...

### Tips to Solve Problems on Volume and Surface Area

IMPORTANT FORMULAE I. CUBOID Let length=l, breadth =b and height =h units. Then, 1. Volume = (l x b x h) 2. Surface area = 2(lb +bh + lh) sq.units 3. Diagonal = units II. CUBE Let each edge of a cube be of length a. Then, 1. Volume = cubic units. 2. Surface area = 2...

### Tips to Solve Problems on Races and Games

Races : A contest of speed in running, riding, driving, sailing or rowing is called a race. Race Course : The ground or path on which contents are made is called a race course. Starting Point : The point from which a race beigns is known as a starting point. Winning Point or Goal : The point set to bound ...

### Tips to Solve Problems on Area

FUNDAMENTAL CONCEPTS : I. Results on Triangles: 1. Sum of the angles of a triangle is 2. The sum of any two sides of a triangle is greater than the third side. 3. Pythagoras Theorem : In a right - angled triangle, 4. The line joining the mid-point of a side of a triangle to the opposite vert...

### Tips to Solve Problems on Profit and Loss

Selling Price (SP) : The price at which the shopkeeper sells the goods is called the selling price (SP) of the goods sold by the shopkeeper. Profit : If the selling price of an article is more than its cost price, then the dealer (or shopkeeper) makes a profit (or gain) i.e Profit = SP - CP; SP &g...