Answer the following 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?
Step-by-step reasoning process: 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.
The answer is 15.

Answer the following question.
The difference in the number of pens that Alice and Clara each have matches their age difference. Alice has 60 pens and Clara has 2/5 times as many pens as Alice. If Alice's age is 20 and Clara is older than Alice, calculate Clara's age in 5 years to come.
Step-by-step reasoning process: If Alice has 60 pens, Clara 2 / 5 * 60 = 24 pens. The number of pens that Alice has more than Clara is 60 - 24 = 36. Since Alice is 20, and the number of pens that Alice has more than Clara is their age difference, Clara is 20 + 36 = 56 years old. In five years, Clara's age will be 56 + 5 = 61 years.
The answer is 61.

Answer the following question.
James has 20 years of experience. 8 years ago John had twice as much experience as James. Mike started when John had 16 years of experience. What is their combined experience?
Step-by-step reasoning process: 8 years ago James had 20 - 8 = 12 years. So 8 years ago John had 12 * 2 = 24 years experience. That means John has 24 + 8 = 32 years experience. So Mike has 32 - 16 = 16 years of experience. So together they have 20 + 32 + 16 = 68 years experience.
The answer is 68.

Answer the following question.
In the engineering department, 70% of the students are men and 180 are women. How many men are there?
Step-by-step reasoning process: The percentage for women is 100% - 70% = 30%. Since 180 represents 30%, then 180 / 30 = 6 students represent 1%. Hence, 6 x 70 = 420 students are men.
The answer is 420.