Quantitative Aptitude - Arithmetic Ability Questions

If 4r = h + r2+h2 then r: h = ? (r not equal to 0)

Twenty one times of a positive number is less than its square by 100. The value of the positive number is

If 2x - 5y = 5 and 2x - y = 9, then x - y is ______.

The co-ordinates of the centroid of a triangle ABC are (1 , -4). What are the co-ordinates of vertex C if co-ordinates of A and B are (3 , -4) and (0 , 5) respectively?

At a telephone exchange, three phones ring at intervals of 20 sec, 24 sec and 30 seconds. If they ring together at 11 : 25 a.m, when will they next ring together?

In the given figure, from the point P two tangents PA and PB are drawn to a circle with centre Oand radius 5 cm. From the point O, OC and OD are drawn parallel to PA and PB respectively. If the length of the chord ABis 5 cm, then what is the value (in deg) of COD?

Find the value of 6813+6413314

Find the odd word/letters/number from the given alternatives.