For the following questions answer them individually
The least positive integer which when divided by 2, 3, 4, 5 and 6 leaves in each case a remainder 1, but when divided by 7 leaves no remainder is
The largest 4 digit number that leaves same remainder 5 when divided by 8, 15, 12, 25 is
The least fraction that should be added to $$3\frac{2}{3}+6\frac{7}{12}+4\frac{9}{36}+6+7+\frac{1}{2}$$ to make the sum a whole number is
$$\left[\left(1 + \frac{1}{2}\right)\left(1 + \frac{1}{3}\right)\left(1 + \frac{1}{4}\right)\left(1 + \frac{1}{5}\right)\right]\left[\left(1 - \frac{1}{2}\right)\left(1 - \frac{1}{3}\right)\left(1 - \frac{1}{4}\right)\left(1 - \frac{1}{5}\right)\right]=$$
The increasing order of the fractions $$\frac{6}{7}, \frac{7}{8}, \frac{5}{6}$$ and $$\frac{4}{5}$$
When the tax on a commodity is diminished by 15%, then its consumption i5 increased by 10%. What is the effect on the revenue derived from it?