Self Maths Puzzle Logical Reasoning General Mental Ability

What is 1 less than 1/4 of a million?

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Self Other Question

main()
{
int i=0;
for(;i++;printf("%d",i));
printf("%d",i);
}
A and B can finish a piece of work in 12 and 18 days respectively. After some days when both start to work together A leaves and B completes the remaining work in6 days. How many days has A worked together before he left?