Quantitative Aptitude - Arithmetic Ability Questions

The price of an article is decreased by 10%. To restore it to its former value, the new price must be increased by

Find the LCM of 0.63, 10.5, 2.1, 4.20

The marked price of a helmet is 30% more than its cost price. If the helmet is sold for Rs 744 after a discount of Rs 36, then what will be the profit percentage?

The first and last terms of an arithmetic progression are 32 and ­-43. If the sum of the series is ­-88, then it has how many terms?

If (4a-3)2=0,then the value of 64a3+12a+13 is

If x+1x=5, then 6xx2+x+1 value is

If Rs. 10000 amounts to Rs. 11664 invested in compound interest(compounded annually) for two years then the annual rate of compound interest is

PQRS is a square, M is the mid-point of PQ and N is a point on QR such that NR is two-third of QR. If the area of ΔMQN is 48 cm2 , then what is the length (in cm) of PR ?