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diwas
CAT Preparation Community 10y ago
find the remainder left after dividing 1! + 2! + 3! +...1000! by 7.
2
Adarsh Srivastava 10y ago
after 7!(including 7!) all numbers will be divisible by 7
so, we have to calculate the remainder when 1!+2!....+6! is divided by 7
which means 873/7..therefore remainder is 5
vidhu prasad 10y ago
5
