Quizzes · Knowledge
Mathematical Brain Teasers: Algebraic & Puzzle Problems: Type-in
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- 01A farmer buys a total of 100 animals (chickens and cows). The total number of legs is 260. How many cows did he buy?
- 02You have some coins: dimes and quarters. Together they total $1.05 and there are 5 coins in all. How many quarters are there?
- 03Three friends split 17 apples so that one gets 3 more than the second, and the second gets 3 more than the third. How many apples does the middle friend get?
- 04A commuter travels to work: each day she increases her speed so that the trip takes 10 minutes less and her speed increases by 20%. If the original travel time was T, what is T in minutes? (Assume time and speed inversely proportional and produce an integer.)
- 05A number decreased by its one-fifth equals 48. What is the number?
- 06Two numbers multiply to 36 and their difference is 5. What is the larger number?
- 07A number plus twice itself equals 45. What is the number?
- 08The product of three consecutive integers is 120. What is the middle integer?
- 09A father is three times as old as his son. In 12 years the father will be twice as old as the son. How old is the son now?
- 10I am thinking of a number. Twice the number plus 3 equals 11. What is the number?