Sunday, February 27, 2011

Seniors & juniors algebra word problem

The original question comes from http://homeschoolmath.blogspot.com/

Question

The total number of girls in the combined junior and senior classes is equal to the number of boys in those two classes. If the senior class has 400 students and the junior class has 300 students, and if the ratio of boys to girls in the senior class is 5:3, what is the ratio of boys to girls in junior class?

Saturday, February 26, 2011

eBook - Model Approach For Primary School Mathematics

Dear Readers,

I just published a eBook in LuLu.com. This ebook features 100 upper primary school problem sum questions with 'Model' answers. It costs only US\$7.99.

Hope you find this useful. Thanks

Question

2/9 of the runners in a race are boys.3/7 of the remaining runners are men.1/4 of the rest are girls. There are 42 more women than girls. How many runners are there in the race?

Question

If 10 workers can build 3 houses in 60 days, how many workers are needed to build 5 houses in 40 days?

Question

ABCD is a square. RS=PR=QR and SQ is perpendicular to PR. Find angle SPQ ?

Question

3 men, A,B, and C, worked together to paint a wall. If the painting was done by one man, the time taken to complete the wall for A,B and C would have been 6hours, 8 hours and 12hours respectively. A and B had painted for 3hours after which A rested, B and C then continued with the painting. What would be the total number of hours taken to complete the wall.

Question

Adam and Rahmad shared some beads. If Adam gave 1/3 of his share to Rahmad, Rahmad would have 70 more beads than Adam. If Adam gave 1/5 of his share to Rahmad, Rahmad would have 10 more beads than Adam. How many beads does Adam have at first?