NCERT Figure it Out 1 - Q7 - Number Play
Question: 661 leaves remainder 3 and 4779 leaves remainder 5 when divided by 7. Without full division, find remainders of 4779+661 and 4779-661 when divided by 7.
Answer: (i) remainder 1 (ii) remainder 2.
Full step-by-step NCERT solution with diagrams on Something by Zero.