mathematics tricks and fun

 6th Lesson Mathematics Tricks and Fun squaring of numbers with same digits by arithmetic progression Hello friends   I am Dr Prema B Sejekan .This is the 6th lesson of Mathematics and Fun tutorial .Here we will learn the squaring of 111, 222,444,555. Once we know the technique , however long the number with same digits we can square it. In this slide squaring of 111 is shown .first we will count the digits in the question.totally 6 digits.so we will mark 6 dots.then we will multiply first lateral digits. 1×1= 01. we will place 0 on the multiplicand side lateral end and 1 on the multiplier side lateral end.Thus we start from both sides.Now add 1 to 0 =1, 1+1=2. Then we count from multiplier side 1+1=2, 2+1=3 so the answer is 012 321 .the second question 1111×1111 total 8 digits. Answer is 0123 4321. In the third example , one digit is extra on one side so the answer is 01 2 21 ie extra digits place will be occupied by 2(0+2=2 or 1+1=2). Another example   1...