[Question]: Lyka wants to buy a smartphone worth $160 but she only has $40 at the moment. She plans to save an equal amount of money per week for two months for the remaining amount that she needs. How much should she save per week?
[Answer]: Lyka has to save a total of $160 - $40 = $120 for two months. There are 2 x 4 = 8 weeks in two months. Hence, Lyka needs to save $120 / 8 = $15 per week.
So the answer is 15.

[Question]: Grace just started her own business. Each week, she charges 300 dollars. Grace's client will pay her every 2 weeks. How many weeks will it take for Grace to get 1800 dollars?
[Answer]: Every two weeks, Grace will get 300 * 2 = 600 dollars. It will take Grace 1800 / 600 = 3 2 - week intervals to get 1800 dollars. It will take Grace 3 * 2 = 6 weeks in total.
So the answer is 6.

[Question]: There are 8 red pens in Maria's desk drawer. There are 10 more black pens than red pens. There are also 7 more blue pens than red pens. How many pens are there in all?
[Answer]:
Maria has 8 + 10 = 18 black pens. Maria has 8 + 7 = 15 blue pens. Maria has 8 + 18 + 15 = 41 pens in total.
So the answer is 41.