Tricks that you were never thought in school| mental maths | math tricks

Tricks that you were never taught in school. Okay, welcome back to my channel now if I had asked you to find square root of Say it's 881 What is the answer? You might find it difficult, right? and If I had asked you to add six eight two plus nine six Let's say five Can you do that in a jiffy like in a very fast? Very fast. I know Some of you may not be able to do that So now i'm going to give you some quick tricks That can help you to do so many things in mathematics in few seconds First is division by five Now anytime you have a number to divide by five, for example, you are asked to divide three to four by five The first thing you need to do is to double these numbers So when you double them, what will you get four times two is eight Two times two is four Three times two is six and this is what you have So you put your decimal point before the last digits and that is your answer Now we can do another example. So if you have six eight four divided by five Double four to have eight double eight to have sixteen right six and carry on Double six to have twelve plus one is thirteen now put your decimal point before the last digit And then you have it your answer again Now as you are asked to divide four eight three by five The same thing double six to get six double three to get six double eight to get sixteen So right six and carry on Double four to get eight eight plus one is nine then put your decimal point before the last digit And that is your answer Now, can you do this for me eight four six two divided by five Now, let's go ahead and Bring another quick method Okay So if you are asked To add large numbers, this is how to go about it So trick number two add large numbers without carry over add large numbers without carry over now For you to do that what you need to do is this is what I really need to write So for you to do that, the first thing you need to do is to This is the equations they say six nine seven plus three six nine We are asked to add this now do it this way six plus three is nine Just ensure you write all your numbers in two digits. So nine is same thing as zero nine Nine plus six is what? Fifteen write it like that Seven plus nine is sixteen write it like that Then you add six six ten carry one and that is your answer one zero six six now another question You are asked to add three seven eight plus nine four seven Three seven eight plus nine four seven now three plus nine is twelve Seven plus four is eleven Eight plus seven is fifteen Then we add we have five We have two we have three and we have one and that is the answer So kindly add this six eight nine plus nine eight eight And tell me what you got on the comments If this is the first time you're coming across this channel, please click the subscription button turn on your notification bell So that you don't miss our videos we upload our videos as much as possible Do click or tune in at your convenience. You must see something you to watch by God's grace Then give us a thumbs up if you love what we are doing All right now the next trick is square root of large four digit numbers square root of large four digit numbers Okay with perfect square That ends with perfect square They must end with what perfect square Now for example, we are asked to find the square root of eight two eight one Eight two eight one now, this is easy Just write 82 plus square root of 81 Okay Now we have 82 plus 9 and this will give us 91 Okay now similarly square root of 9025 Is going to be 90 plus square root of 25 So this will be 90 plus 5 which will give us 95 You can see how easy that is, right So similarly we have square root of 84 64 and that will give us 84 plus square root of 64 And that is 84 plus 8 and that is 92 All right kindly tell us what is the square root of It's 836 on the comments now the next Uh trick that we are going to learn is tables of seven eight nine and nineteen the truth remains that Even to even some of us adults still find it difficult to memorize the tables The timetable, okay, but I have some tricks for some of them not all anyway So tell me on the comments if you want more of these tricks and I will get the second part of this video in my next video All right. So let's start with tables of seven so tables of seven is Just draw a three by three Something like this three by three. Okay Then you are going to have one two three four five six seven eight nine Then the next thing is from here write zero one two continue two three four four five six Then the last will be 70 and that is seven times 10 So this is very very easy seven times one two, three, four, five six, seven eight nine and ten Now similarly, let's talk about tables of eight So we have eight times one eight times two eight times three eight times four eight times five eight times six Eight times seven eight times eight Eight times nine and eight times ten So what do we do next? You're going to see For yourself so get to five and take half of it Then you start zero one two three four Then continue with four again four five six seven eight Then from the back you start with zero two four six and eight Then here again zero two Four six and eight and then you have it tables of eight without Having to go through the stress of memorizing or cramming Now tables of nine or table of nine is the most interesting of them all now for table of nine so we have nine times one nine times two nine times three nine times four nine times five nine times six nine times seven nine times eight nine times nine and nine times ten Now this table of nine is what has given me the highest view i've ever gotten on social media Yes of all my social media platforms Here on youtube this particular table of value as a trick on its own on my short Has given me over 20 million views and all thanks to all of you So today i'm going to bring it to more people or for more people to see That is for those of you that love watching my long form videos. Now. This is very easy from here You have zero one two three four five six seven eight and nine From back again zero one two three four five six seven eight and nine Amazing, right? Yes, I know now Table of 19 is also an amazing table very very interesting now for table of 19 We have 19 times 1 19 times 2 19 times 3 19 times 4 19 times 5 19 times 6 19 times 7 19 times 8 19 times 9 And 19 times 10. I don't know if you can see see this to this point Okay, so 19 times 10 is what we have here Then we solve So we start with 1 You write only the odd numbers 1 3 5 7 9 11 13 15 17 and 19 Okay, then you start 0 1 2 3 4 5 6 7 8 and 9 And then you have it your table of 19 is ready Okay All right now I hope I can see my thank you on the comment section Now let us look at another amazing Trick that you will never ever learn in school now this is um Let us square numbers that end with 5 If you square numbers that end with 5 Okay So square numbers that end with 5 for example, you have 65 squared Or say it 5 squared Or say 15 squared Or say 25 squared as long as that number ends with 5 And you want to square it. That is the fastest way you can ever do Now what you will have to do is 5 squared is 25 So after 6 you have 7 7 times 6 is 42 And there you have it 4,225 similarly 5 squared is 25 8 squared is sorry after 8 you have 9 And 9 times 8 we give us 73 And that is your answer So for 15 squared we have 5 squared is 25 After 1 you have 2, 2 times 1 is 2 and that is your answer So the answer to this is 625 Most of us know that but can you try to get 625 using the same method? now Another interesting trick That I want to share with us today is to square two-digit numbers two-digit numbers Okay, just square any two-digit number for example you have 46 squared Between 1 and 100. Okay, so we have 46 squared. What you need to do is 6 squared is 36 4 squared is 16 Now 4 times 6 times 2 Okay, 4 times 6 is 24 And 24 times 2 is 48. So add that 48 Ensure that you leave the first number. Okay All right So we add 6 11 carry 1 11 carry another 1 and there you have it 2116 if there is no mistake with this calculation, okay So 6 we come down we have 11 carry 1 another 11 and so this should be the answer Now another example we have 32 squared Now you will notice That 2 squared is 4. Now when making use of this particular method always ensure That the number you are squaring this square you will get is in two digits Okay, so i'll write this 4 as a two-digit number So 2 squared is 4 0 4 Now 3 squared is 9 0 9 Ensure that any number you get that is not in two digits should be written as a two-digit number Now we write the next 3 times 2 times 2 and that is 3 times 2 is 6 6 times 2 Is 12 so we add remember to leave the first digit. So we have 4 and we have 1024 Now i'd like you to solve 58 squared using the same method In the comments. Thank you so much for watching I remember comment part two if you want me to drop part two of this trick because I have a lot of them Okay, if you want me to combine another set, let me know on the comments. Thank you for watching and