1) 2 less than 7 times a number: To solve this, you need to multiply a number by 7 and then subtract 2.
2) Sarah's age decreased by 2: To solve this, you simply subtract 2 from Sarah's age.
3) One third as many books: To find the number of books, you need to divide the given quantity by 3.
4) Earns $13 per hour: This means the person earns $13 for every hour worked.
5) 4 years younger than Marcus: To find the age of the person, you subtract 4 from Marcus's age.
6) 2 times a number, decreased by 4: To solve this, you multiply a number by 2 and then subtract 4.
7) 9 less than the product of 15 and a number: To find the result, you need to multiply 15 by a number and then subtract 9.
8) The quotient of a number and 9, increased by 4: To solve this, you divide a number by 9, and then add 4 to the quotient.
9) 2 less than the product of 6 and a number: To find the result, you multiply 6 by a number and then subtract 2.
10) 10 less than the product of 16 and a number: To solve this, you multiply 16 by a number and then subtract 10.
11) 6 fewer than the product of a number and 7: To find the result, you multiply a number by 7 and then subtract 6.
12) The number of students in 7 equal-sized classes: To find the number of students, you need to multiply the number of students in one class by 7.
13) 6 more than twice a number: To solve this, you multiply a number by 2 and then add 6.
14) Two-thirds as many books as the library: To find the number of books, you need to multiply the total number of books in the library by two-thirds.
15) 5 times the sum of 2 and a number: To solve this, you add 2 to a number and then multiply the sum by 5.
16) In 2 years, Lisa will be twice my current age: To find Lisa's current age, you subtract 2 from the difference between Lisa's age in 2 years and your current age.
17) If I had 3 more dollars, I'd have half as much money as Misha: To find how much money Misha has, you double the amount you have and add 3.
18) A 75,000 L pool is draining at a rate of 200 L per minute: To find the time required to drain the pool completely, you divide the total volume of the pool by the rate at which it is draining.
19) My friend and I split the cost of a $13 pizza and 2 cans of soda: To find the cost each of you paid, you divide the total cost by the number of people sharing it.
20) Create and solve your own story problem: You can create your own story problem by thinking of a scenario and then using mathematical operations to find an answer. For example: "If there are 15 apples in a basket and Tom eats 3 apples, how many apples are left?" The answer would be 12 apples, obtained by subtracting 3 from 15.