The marks of Aslam, Asghar, Shoib, Muqarab and Danish in a class are 70%, 77%, 78%, 82% and 85% respectively. What is average percentage of all the five?

A) 78%

B) 70%

C) 80%

D) None of these

We know that:

Average= sum of numbers/total numbers

Average = [70%+77%+78%+82%+85%]/5

Average-= 392/5

Average=78%

Four boys shared a certain amount of money.The first received 1/6 of it, the second 1/8, and the third got 1/2. If the fourth received 5, how much was the total money?

A) 70

B) 60

C) 80

D) None of these

Let total Sum = X

1st friend received = X * 1/6

2nd friend received = X*1/4

3rd friend received  = X*1/2

4rth friend received = 5

So:

X/6 + X/4 + X/2 + 5 = X

(2X+3X+6X) – 12X / 12 = -5

-X/12 = -5

X = 60

A) 101.06

B) 95.04

D) 100.05

D) None of these

A) 2039

B) 2239

C) 2453

D) None of these

A triangle’s two angle’s are 45° and 60°. What is the value of its third angle?

A) 75°

B) 50°

C) 90°

D) None of these

We know the:

Sum of angles of a triangle is equal to 180

⇒ A+B+C= 180°

45°+60°+C=180

105+ C =180

C= 180-105

C=75°

A right angled triangle’s base is 8cm and perpendicular is 6cm. What is the length of the third side?

A) 5cm

B) 6cm

C) 10cm

D) None of these

Using Pythagoras theorem:

a²+b²=c²

8²+6²=c²

⇒   c=10cm

Two classrooms are to be built in a school and planned that 8 masons and labours shall complete them is 20 days. If the number of workers is increased up to 10, how many days will be taken in the completion of work?

A) 10 days

B) 16 days

C) 14 days

D) None of above

8 men can do work = 20 days

1 man can do this work = 8*20

10 men can do that work = [8*20]/10

=16 days

A long rope has to be cut to make 23 small pieces if it is double folded to start with how many times does it need to be cut?

A) 6 times

B) 7 times

C) 11 times

D) None of these

By Using formula

2n+1=23

⇒    n=11

Arranged 3/4,5/9 and 7/12 in descending order?

A) 5/9, 7/12, 3/4

B) 7/12, 3/4, 5/9

C) 3/4, 7/12, 5/9

D) None of these

First we take LCM  that is 36

[ 3*36]/4 = 27

[ 5*36]/9= 20

[ 7*36]/12= 21

27>21>20

3/4>7/12>5/9

A) 9/16

B) 4/16

C) 5/16

D) None of these