When Anna was about to add a 2-digit number to another 2-digit number, she misread the digit 5 in the ones place as 3. She also misread the digit 1 in the tens place of another number as 7. As a result, the sum became 131. What would be the correct sum if she had read the numbers carefully ?

Alison and Brenda have 64 dollars altogether. Brenda and Charmaine have 67 dollars altogether. Charmaine and Darrell have 72 dollars altogether. How much do Alison and Darrell have altogether ?

A caterpillar grew twice the length as compared to the previous day. If it  measured 32 mm on the 12^th day, on which day was the length of the caterpillar 8 mm ?

There are 2 red socks, 2 blue socks in a drawer. How many socks must Peter draw, in total darkness, before he gets two socks of the same colour ?

A train has 6 compartments. Each compartment is 6 m long. The compartments are joined by connectors of length 1m. How long is the train ?

The university is four stations away from the downtown. If a train stops at each station for 1 minutes and takes 2 minutes to travel from one station to another, how long will it take for the train to reach the downtown from the university ?

It takes Professor Geogre 16 minutes to cycle from the first lamp post to the fifth one. How long will it take him to cycle past the tenth lamp post ?

There are two rows of coins on the table. The first row has 10 coins and every two coins are placed at a 5 cm interval. The second row has 18 coins and every two coins are placed at a 2 cm interval. Which row is longer ?

A bus leaves its station every 15 minutes. The tenth bus leaves the station at 9 am. At what time does the first bus leave the station ?

It takes Mr Jackson 5 minutes to chop a piece of log into halves. How long does it take him to chop the same piece of log into four equal pieces ?

Cindy uses 20 erasers in a game of dominoes. Every two erasers are placed 2 cm apart on the table. How far is the last eraser from the first one ?

Julia stays on the fourth floor of an apartment. There are 18 steps on each staircase. How many steps on the staircases does Julia have to climb to reach her floor ?

A tree is planted every 6 m along a road from end to end. How many trees are planted along the road if it is 360 m long ?

How many knots are there if you tie all 10 ribbons together ?

The Greyhound couches leave a station every one and a half hours. If the first coach leaves at five o’clock in the morning, at what time does the fourth coach leave the station ?