KD
Kevin Durant won the 2013–14 NBA Most Valuable Player (MVP) award. In the expression KD + 35 = MVP, each letter represents a different single digit number. K and M are not zero. If P = 3, what’s the two-digit number KD?
Posts
Jump Rope Training
Leo is preparing for a jump rope competition to be held within a year. Leo’s personal record is currently less than the national record 80. He plans to improve his personal record for 30 seconds double under by 1 every month. By doing so, the sum of his monthly records (from the current month to the competition month) would be 465. What is the highest possible personal record does Leo have now?
Missing Operators
Insert an arithmetic operation (addition, subtraction, multiplication, or division) to each slot between two adjacent numbers of the expression N = 1 __ 3 __ 5 __ 6 __ 4 __ 2. If each of the four operations has to be used at least once, what’s the smallest possible value of N?
Angela's Coins
Angela has 4 coins: a penny, a nickel, a dime, and a quarter. How many different face values can she make using one or more of these coins?
Reading Books
Dr. Hong bought five books for Leo and Angela. During the first week, Leo finished reading four of them, while Angela finished three of them. At least how many books were read by both Leo and Angela?
Dinner Time
It’s dinner time for the Hong family. It takes 30 minutes for Dr. Hong to finish the meal, 30 minutes for Dr. Wang, 80 minutes for Leo, and 60 minutes for Angela. If they start the meal together at 6pm, when will the family finish their meals?
Adding 16 Numbers
Without using a calculator, calculate: 1 + 2 + 8 + 9 + 11 + 12 + 18 + 19 + 21 + 22 + 28 + 29 + 31 + 32 + 38 + 39 = ?
Math Kangaroo
Math Kangaroo is a popular math contest. There are 24 questions in the test. Each question has point value. 1/3 of questions are 3 points each; 1/3 are 4 points each, 1/3 are 5 points each. The sum of earned points is the student's final score. Leo and five other kids join the contest. The median and mean of their scores are both 90. If they all have different scores, what's the lowest possible score among them?