A stationer bought 2,000 exercise books. He distributed 200 exercise books to the students from poor economical background as donation. He sold each of the
remaining exercise books at Rs 10 more than the cost price of each and gained
8%, find the cost price of each exercise book.

What is the value of x when x + 7 = 21?

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.

Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue