Rajiv Kumar Smart approach of mulitiplication Smart approach of multiplication For example 99*8 First multiply 8*90=720 Now multiply 8*9=72 Now add both=720+72=792 Now try this 55*7 67*4 45*3... 14 Aug 2026
Rajiv Kumar Digital Sum Discover our highlights Digital Sum Digital Sum is basically the remainder when we do divison by 9 For example 1852/9=remainder 7 But we can find remainder by adding digits and consider the sum of 9 a... 14 Aug 2026
Rajiv Kumar Digital Sum Latest Stories Explore fresh ideas and updates from our editorial team. See All Start writing here...... 14 Aug 2026
Rajiv Kumar Finding last two digits of a number Start writing here...... Finding last two digits of a number 13 Aug 2026