Find the missing number in the box

2         1          8           9        4           3           ……             7

A palindrome is a number that reads the same forwards and backwards. Write the next palindrome on the given line.

1           121                 12321           …………..

Sara bought a pen at 25 dollars and sold it for 30 dollar. She then bought the same pen back at 35 dollars and sold it again for 40 dollars. Did she make or lose money from these two deals in the end ?

James and Joseph want to buy a book. James is short of 2.40 dollars and Joseph is short of 3.60 dollars. They are able to buy the book when they poll their money. How much does the book cost?

A bus left its terminal with 18 commuters. 4 commuters alighted from the bus at the second stop. At the same stop, 8 commuters boarded the bus. How many commuters were on the bus after the second stop ?

A square monopoly board has 10 boxes on each side. How many boxes are there altogether ?

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 ?