65
Q:

# If × stands for 'addition', ÷ stands for 'subtraction', + stands for 'multiplication' and-stands for 'division', then 20 × 8 ÷ 8 - 4 + 2 = ?

 A) 80 B) 25 C) 24 D) 5

Explanation:

By the Given data , We have the expression:

20 + 8 - 8 ÷ 4 × 2 = 20 + 8 - 2 × 2 = 20 + 8 - 4 = 24.

Q:

The value of -4-(-10) is how much greater then the value of -10-(-4) ?

 A) 10 B) 6 C) 12 D) 0

Explanation:

-4-(-10) = -4+10 = 6

-10-(-4) = -10+4= -6

$\therefore$  6-(-6) = 6+6 = 12

4 37
Q:

A sum of Rs.1890 has to be used to give 9 prizes to the customers of a super market for their overall academic purchases. If each prize is Rs.30 less than its preceding price, what is the least value of the price ?

 A) 90 B) 95 C) 85 D) 80

Explanation:

Let the least value of the prize = Rs. x
Then the next value of the prize is x+30 , x+60, x+90, ....x+240.
Given total amount of cash prizes = Rs.1890
$\Rightarrow$ x + (x+30) + (x+60) + (x+90) + ....+ (x+240) = 1890
$\Rightarrow$   9x + (30 + 60 + 90 + 120 + 150 + 180 + 210 + 240) = 1890
$\Rightarrow$   9x + 30(1 + 2 + 3 + 4....+ 8) = 1890
$\Rightarrow$   9x + 30(36) = 1890
$\Rightarrow$  9x = 810 $\Rightarrow$ x=90
Hence the least value of the prize x=90

7 93
Q:

12:30 :: 14: ?

 A) 36 B) 28 C) 35 D) 42

Explanation:

Here 12 $\times$ 2.5 = 30

In the same way 14 $\times$ 2.5 = 35

11 137
Q:

In a group of buffaloes and ducks the number of legs are 24 more than twice the number of heads. What is the number of buffaloes in the group ?

 A) 6 B) 18 C) 12 D) 24

Explanation:

Let the number of buffaloes be x

and number of ducks be y.

Now, number of heads = x+y

Number of legs = 4x+2y  .......(1)

But given that legs = 2(x+y)+24 ......(2)

solving (1) & (2),we get

4x+2y=2x+2y+24 $\inline&space;\fn_jvn&space;\small&space;\Rightarrow$ 2y=24  $\inline&space;\fn_jvn&space;\small&space;\Rightarrow$y=12  $\inline&space;\fn_jvn&space;\small&space;\Rightarrow$ x=12.

Therefore number of buffaloes =12

8 68
Q:

If A + B = 2C and C + D = 2A, then

 A) A + C = B + D B) A + C = 2D C) A + D = B + C D) A + C = 2B

Answer & Explanation Answer: A) A + C = B + D

Explanation:

Given,

A + B = 2C ----(i)

C + D = 2A----(ii)

Adding (i) and (ii) we get : A + B + C + D = 2C + 2A  $\inline \Rightarrow$ B + D = A + C