Que : Average of 5 consecutive even numbers is 12 . Find the sum of 1st and last numbers. Sol : shortcut... If consecutive numbers average is given, then average is (1st + last)/2 = 12 Therefore sum of 1st and last = 12*2 = 24
A quadratic equation is very important for a student who studies in 10th std or competitive exam. I learned one. I've searched before and not so many people know about it, so I'm helping you guys now....
I will explain a simple and fastest process of multiplication. This can help you to get answers faster. Let's assume you have to multiply 9999 X 2456. Now think how much time it will take? Maybe 30...