During a trip to the beach, Rafi built sandcastles with 2 towers each, and Monica built sandcastles with 15 towers each. Before leaving, they counted the towers and realized that they had each built the same number. What is the smallest number of towers each must have built?

Anna has five circular discs of different sizes. She wants to build a tower of four discs so that each disc in her tower is smaller than the disc immediately below it. How many different towers could Anna build?4591220

It takes thirty kids four hours to build a man-sized sand castle.How many kids were there if the same game took only two and a half hours?

At the beach, Garrett and his sister both built sandcastles and then measured their heights. Garrett's sandcastle was 9/10 of a foot tall and his sister's was 3/5 of a foot tall. How much taller was Garrett's sandcastle than his sister's?Write your answer as a fraction or as a whole or mixed number.

Anna has five circular discs that are all of different sizes. She wants to build a tower usingthree discs where a smaller disc always has to lie on top of a bigger disc.How many ways are there for Anna to build the tower?(A) 5 (B) 6 (C) 8 (D) 10 (E) 15

Marie wishes to plant pumpkins and sunflowers, so this morning she bought packs of seeds at a local gardening shop. Pumpkin seeds were sold in packages of 11 seeds, while sunflower seeds were sold in packs of 12. If Marie bought the same number of each type of seed, what is the smallest number of pumpkin seeds she must have bought?