Quantitative aptitude

Direction: Find out the missing number in the following number series. Q) 13, 26, 78, ?, 2730, 30030 A. 312 B. 390 C. 448 D. 273 E. 39 Sol: 13 * 2 = 26 26 * 3 = 78 78 * 5 = 390 390 * 7 = 2730 2730 * 11 = 30030

Train A crosses a man standing on a platform in 10.8 seconds. Train B crosses train A is running in the opposite direction in 16 seconds. If the length of train A and B is 180 m and 220 m respectively, then what is the time taken by train B to cross a car is

150% of the number A is equal to half of the number B. If 3 is added to number A, then the number A becomes 180 of its reciprocal. Find the number B? A.            20 B.            48 C.            64 D.            36 E.            None of these Sol: Let the number A = 2x And the number

Direction: What value should come in the place of (?) in the following questions. Q) (7/84) of (12/156) of 4680 = 45 – ? A.            15 B.            20 C.            25 D.            30 E.            None of these Sol: (7/84)*(12/156)*4680 = 45 – x 30 = 45 – x x = 45 – 30 = 15

43.132 + 27.972 – 49.212 = ? A. 286 B. 276 C. 258 D. 232 E. 248 Sol: 43.132 + 27.972 – 49.212 = ? 1849 + 784 – 2401 = ? ? = 232

A boat covers 154 km upstream in 7 hours and the boat covers 217 km in still water in 7 hours. Find the difference between the time taken by the boat to cover 240 km downstream and 110 km upstream? A.            2 hours B.            5 hours C.            3 hours D.            1 hour E.            None of

18 men can do a work in n days. If 15 men started the work and after 10 days, (n – 5) more men joined the work and the remaining work was completed in 7 days, then find the value of n? A.            10 B.            35 C.            15 D.            20 E.            None of these Sol:

Directions: What value should come in the place of (?) in the following questions. Q. ? % of (75 × 4 – 150) = 420 + 752 A. 4280 B. 4520 C. 4030 D. 5060 E. None of these Sol: x % of (75 × 4 – 150) = 420 + 752 (x/100)*(300 – 150)

The age of A 3 years hence is three times the age of B 5 years ago and A is 9 years younger than C. If the sum of the present age of A, B and C together is 78 years, then find the present age of C? A.            39 years B.            51 years C.           

Direction: What value should come in the place of (?) in the following questions. Q) 55% of 4800 – (1/5) of 900 + 45% of 1600 =? – 450 A. 5140 B. 2860 C. 4250 D. 3630 E. None of these Sol: 55% of 4800 – 1/5 of 900 + 45% of 1600 = ?