If a2+b = 45 and ab = 18 find 1/a+1/b
A rectangular hall 39 m 10 m long and 35 m 70 cm broad is to be paved with square tiles. Find the largest tile which will exactly fit and the number required.
A's new salary after 15% increase is INR 1932. What is the old salary
The G.C.D. and L.C.M. of two numbers are 120 and 720 respectively. If one number is 360, the other number is
The GCD of 2x2+3x-2, x2-x-6, x2+3x+2 is
Average of a,b,c is 12 and the average of b, c is 15. So find the value of a.