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120 lessons,
20h 16m
Number System (Divisibility rule - 4) (in Hindi)
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Number System (Divisibility rule - 4) (in Hindi)

Bharat Gupta is teaching live on Unacademy Plus

Bharat Gupta
Engineer by degree Mathematician by Heart. Having 22 years of teaching experience. More than 20000 students selected.

Unacademy user
Shikhar Makwana
3 months ago
thanks for your appreciation
in cat 1998 quest. why two digit no. is 90 and not 91?
sir, can u plz explain thi formula ...a+(n-1)d
in the first question,last 2 digit must be divisible by 4.So only 1,3,5,7,9 possible.Again After being divided by 4 the last digit must not be odd to be divisible by 2 again.Placing 1,5,9 leaves odd so only 3 or 7 possible