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Concept Lesson 1  
Interactive Exercise 1  
Concept Lesson 2  
Interactive Exercise 2  
Concept Lesson 3  
Interactive Exercise 3  
Concept Lesson 4  
Interactive Exercise 4  
Concept Lesson 5  
Interactive Exercise 5  
Concept Lesson 6  
Interactive Exercise 6  
How many numbers between 100 and 300, inclusive, are multiples of both 5 and 6? 

What is the first number greater than 200 that is a multiple of both 6 and 8? 

The L.C.M. of two numbers is 1890 and their H.C.F. is 30. If one of them is 270, then other is? 

What is the greatest possible rate at which a man can walk 51 km and 85 km in an exact number of minutes? 

Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep together again for the first time? 

A forester wants to plant 44 apple trees, 66 banana trees and 110 mango trees in equal rows (in terms of number of trees). Also, he wants to make distinct rows of trees (i.e. only one type of tree in one row). What will be the minimum number of rows required? 

Three runners running around a circular track, can complete one revolution in 2,4 and 5.5 hours respectively. When will they meet at the starting point? 

Find the largest 4digit number which can be added to 7249 in order to make the derived number divisible by each of 12, 14, 21, 33, and 54? 

What is the greatest number of 5digits, that will give us a remainder of 5 when divided by 8 and 9 respectively? 

What will be the least possible number of planks, if three pieces of timber 42m, 49m and 63m long have to be divided into planks of the same length? 

.The product of two numbers is 1320 and their H.C.F. is 6. What will e the L.C.M. of the numbers? 

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Selected MCQs  
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