81 x 9 = 801. What must you do to make the this equation true?

Answer: Turn it upside down. 108 = 6 x 18.

More Math Riddles with answers

More Math Riddles

A 300 ft. train is traveling 300 ft. per minute must travel through a 300 ft. long tunnel. How long will it take the train to travel through the tunnel?
A bat and a ball cost $1.10. The bat costs one dollar more than the ball. How much does the ball cost?
A bird has a head 9cm long. The tail is equal to the size of the head plus a half of the size of the body. The body is the size of the head plus the tail. How long is the bird?
A box of hardware contains nuts and bolts. The bolts account for 25 percent of the number of items in the box. What percentage are the bolts of the entire box?
A car's odometer shows 72927 miles, a palindromic number. What are the minimum miles you would need to travel to form another?
A cell phone and phone case cost $110 in total. The cell phone costs $100 more than the phone case. How much was the cell phone?
A certain number has three digits. The sum of the three digits equals 36 times this number. Seven times the left digit plus 9 is equal to 5 times the sum of the two other digits. 8 times the second digit minus 9 is equal to the sum of the first and third. What is the number?
A duck was given $9, a spider was given $36, a bee was given $27. Based off of this information, how much money would be given to a cat?
A farmer has 17 sheep and all but 9 die. How many are left alive?
A farmer has 17 sheep and all but 9 run away. How many are left?
A frog fell into a well 12 feet deep. He could jump 3 feet, but every time he jumped 3 feet, he fell back 2 feet. How many times did he have to jump to get out of the well?
A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?