**Question 6:**Find the number of the multiples of 8 between 100 and 300.

*Solution*:

**Question 7:**Find the sum of all the multiples of 7 between 100 and 500.

*Solution*:

**Question 8:**If ${\mathrm{log}}_{10}p,\text{}{\mathrm{log}}_{10}pq\text{and}{\mathrm{log}}_{10}p{q}^{2}$ are the first three terms of a progression, show that it forms an arithmetic progression.

*Solution*:

**Question 9:**Show that the volumes of the cylinders in the above diagram form an arithmetic progression and state its common difference.

*Solution*:

**Question 10:**The sequence –11, –5, 1,… is an arithmetic progression. State the three consecutive terms of this arithmetic progression where the sum of these three terms is 93.

*Solution*:
i cant open the next aritmetic progressions