60
Q:

If × means ÷,  - means ×,  ÷ means + and  + means- than (3 - 15 ÷ 19) × 8 + 6 = ?

A) 8 B) 4
C) 2 D) -1

Answer:   C) 2

Explanation:

By the given data, we have  the expression :

(3 × 15 + 19) ÷ 8 - 6 = (45 + 19) ÷ 8 - 6 = 64 ÷ 8 - 6 = 8 - 6 = 2

Q:

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

A) 10 B) 6
C) 12 D) 0
 
Answer & Explanation Answer: C) 12

Explanation:

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

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

  6-(-6) = 6+6 = 12

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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
 
Answer & Explanation Answer: A) 90

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
 x + (x+30) + (x+60) + (x+90) + ....+ (x+240) = 1890
   9x + (30 + 60 + 90 + 120 + 150 + 180 + 210 + 240) = 1890
   9x + 30(1 + 2 + 3 + 4....+ 8) = 1890
   9x + 30(36) = 1890
  9x = 810  x=90
Hence the least value of the prize x=90

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7 93
Q:

12:30 :: 14: ?

A) 36 B) 28
C) 35 D) 42
 
Answer & Explanation Answer: C) 35

Explanation:

Here 12  2.5 = 30

In the same way 14  2.5 = 35

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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
 
Answer & Explanation Answer: C) 12

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  2y=24  y=12   x=12.

Therefore number of buffaloes =12

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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   B + D = A + C

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40 1903