In this video RAJA SIR is discussing a new concept of Digit sum.
Many questions are asked in various examinations such as CAT, SSC CGL, SSC CHSL, SSC CPO, BANK PO, BANK CLERK, RAILWAY, LDC etc., you can solve those questions very easily by digit sum in just 2-3 seconds.
Digit Sum is a revolutionary concept and very useful for solving the questions pretty fast. The mathematical operation you do with question the same mathematical operation can be done with the DIGIT SUM of that question. In digit sum we doesn’t count 9.
Example- if there is a number 12345 and we have to get the square of it.
So digit sum of 12345= 1+2+3+4+5=15=1+5=6
Square of the digit sum= (6)2=36=3+6=9
Now the digit sum of the square of 12345 will be 9.
In the given question (11111)2 the digit sum of the answer will be (1+1+1+1+1)2=25=2+5=7
You can use DIGIT SUM not only in number system but also in every topic of maths like average, time and distance, percentage and even mensuration too.
RAJA SIR is selected as Income Tax Inspector in 2011 with AIR-24 having an experience of 12 years in teaching and have concepts that you have never seen before.
RAJA SIR has already provided you many unique concepts on this channel and will provide in future too so watch all the previous videos if you have not seen till now to boost your speed.
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