There are 90 pupils in the library. The girls are 28 more than the boys. How many girls are there?

Sheila is 3 years younger than Merlie. Their total age is 67. How old is each of them?

There are 60 pupils in the bus. The number of girls is three more than twice the number of boys. How many are girls in the bus?

On the table are 44 books on Science, History, and Geography. There are twice as many Science books as there are History books. There are 8 Geography books. How many Science books? How many History books?  

A pencil costs t pesos. Another pencil cost Php 8.51. What is the total cost?

Tom sold half of his comic books and then bought six more. He now has twelve. How many did he begin with?

The length of a rectangular plot of land is 3 times its width. If the width is 4 m, find the perimeter of the plot of land.

A class of 50 pupils is divided into two groups. One group has eight less than the other. How many are in each group?

If the sum of three consecutive numbers is 72, What is the largest number?