Quantitative Aptitude - Arithmetic Ability Questions

Pass percentage  =[(252/270)*100] % =280/3 % =9313 9 %

The given number series 410, 409, 413, 404, ? , follows a pattern that 

410

$$\begin{gathered} 410 - 13 = 409 \\ 409 + 22 = 413 \\ 413 - 33 = 404 \\ 404 + 42 = 420 \end{gathered}$$

Hence, the next number in the given series is 420.

Each of the integers in the first set could be combined with any from the second set, giving a total of 4 x 5 = 20 possible pairs.

Of these the combinations that could give a sum of 23 are (5 + 18), and (9 + 14)

This means that the probability of getting a sum of 23 is 2/20 = 1/10

Other side = [(17 x 17) - (15 x 15)] = (289 - 225) = 8m
Area = 15 x 8 =120 sq. m

Cost Price = Rs.100125×8750 = Rs. 7000. Let the labelled price be Rs. x. 

Then, 70100*x=7000 ⇒x=Rs.7000*10070 

= Rs.10000

Let C.P be Rs. x 

900 - x = 2(x - 450)     => x = Rs.600   

C.P = 600 gain required is 25% 

S.P = [(100+25) x 600] / 100 = Rs.750

The given number series is 180, 90, 60, 40, 36

It follows a pattern that,

180 x 1/2 = 90

90 x 2/3  = 60

60 x 3/4  = 45 (NOT 40)

45 x 4/5  = 36

Hence, the wrong number in the given series is 40.