Quantitative Aptitude - Arithmetic Ability Questions

Marks in English  = 85×7 – 83×6

= 595 – 498

= 97

BD = Rs.100

TD = Rs.80

R = 10%

F=BD×TDBD-TD=100×80100-80=Rs.400 

BD = Simple interest on the face value of the bill for unexpired time= FTR/100

$$\begin{gathered} ⇒100=400×T×10100 \\ \end{gathered}$$

=> T = 2.5 years

1 < 4n + 7 < 200

n can be 0, or -1

n cannot be -2 or any other negative integer or the expression 4n + 7 will be less than1.

The largest value for n will be an integer < (200 - 7) /4

193/4 = 48.25, hence 48

The number of integers between -1 and 48 inclusive is 50

By investing Rs. 136, income obtained = Rs. 10.

By investing Rs. 6800, income obtained = Rs.1036×6800 = Rs. 500.

x^z = y²        10^(0.48z) = 10^{(2 x 0.70)} = 10^1.40

 0.48z = 1.40

 z = 140/18 = 35/12 = 2.9 (approx.)

Let the ten's digit be x and unit's digit be y. Then, (10x + y) - (x + y) = 9 or x = 1.

From this data we cannot find  y, the unit's digit. So the data is inadequate..

Shopkeeper sells at CP using weight of 900 gm instead of1 kg

So, 1000gm –900 gm = 100gm

⇒100/900 X 100

⇒100/9 %