A. 100m
B. 150m
C. 200m
D. 300m

A. 45m
B. 80m
C. 100m
D. 110m

Today is Khadija’s birthday. After one year, she will become two times as she was ten years ago. current age of Khadija?

A. 19
B. 20
C. 21
D. 22

Solution

Let her age be x
after 1 year her age will be x+1 = 2(x-10)
x+1 = 2x-20
1+20 = 2x-x
x = 21 years

A. 47.55 kg
B. 48 kg
C. 48.55 kg
D. 49.25 kg

A person travels from x to y at a speed of 40Km/h and returns by increasing his speed 50%. What is his average speed for both the trips?

A. 36km/h
B. 45km/h
C. 48km/h
D. 50km/h

Solution

Speed of person from x to y =40 km/h
Speed of person from y to x =(40×150)/100 = 60km/h
Since the distance traveled is the same
Therefore, Average Speed = (2x40x60)/40+60 = 48km/h

The mean marks of 30 students in a class is 58.5. Later on it was found that 75 was wrongly recorded as 57. Find the correct them.

A. 57.4
B. 57.5
C. 58.9
D. 59.1

Solution

Correct mean = 30x 58.5 -57 +75/30
= 1755+18/30 = 1773/30 = 59.1

The average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

A. 35 years
B. 30 years
C. 40 years
D. None of these

Solution

27×3+3×3=90 hsbnd,wife n child
20×2+5×2=50 wide n child
Hsbnd age= 90-50
= 40 yrs

A cricketer has a certain average for 10 innings. In the eleventh inning, he scored 108 runs, there by increasing his average by 6 runs. His new average is:

A. 48 runs
B. 52 runs
C. 55 runs
D. 60 runs

Solution

Let average for 10 innings be x. Then,

(10x + 108)/11 = x + 6
= 11x + 66 = 10x + 108
= x = 42.
New average = (x + 6) = 48 runs

The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is:

A. Rs. 3500
B. Rs. 4000
C. Rs. 4050
D. Rs. 5000

Solution

Let P, Q and R represent their respective monthly incomes. Then, we have:

P + Q = (5050 * 2) = 10100 — (i)
Q + R = (6250 * 2) = 12500 — (ii)
P + R = (5200 * 2) = 10400 — (iii)
Adding (i), (ii) and (iii), we get:
2(P + Q + R) = 33000 = P + Q + R = 16500 — (iv)
Subtracting (ii) from (iv), we get, P = 4000.
P’s monthly income = Rs. 4000

A. 17 kg
B. 20 kg
C. 26 kg
D. 31 kg