What is the next number in the series 1,4,9,16 ---?

A and B can do a work in 12 days. B and C can do it is 15 days, and A and C can do it in 20 days. If all of th...

Lima is 10 years older than Rima. In 7 years time, Lima will be twice as old as Rima. Find Lima's age now?

If the average of four numbers k, 2K+3, 3K-5 and 5K+1 is 63. What is the value of K?

If a photocopier makes 2 copies in 1/3 second, at the same rate how many copies does it make in 4 minutes?

The value of -3-(-10) is how much greater than the value of -10-(-3)?

একটি রেখাংশের উপর অঙ্কিত বর্গক্ষেত্র ঐ রেখাংশের এক-তৃতীয়াংশের উপর অঙ্কিত বর্গক্ষেত্রের কত গুণ?