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 ?

Correct Answer: 70000

Explanation:

$$\begin{gathered} 112 × 5 4 \\ 112 × 10 2 4 \\ = 112 × 10000 2 4 \\ = 1120000 / 16 \end{gathered}$$

= 70,000.

Correct Answer: 166252

Explanation:

Given  9261 3 x 62742241 = ? + 89

 

Using unit digit method,

 

On LHS,

 

1 x 1 x 1 = 1

 

sqrt of last digit 1 => it must end with either 9 or 1

 

so now

 

1 x 1 = 1

 

1 x 9 = 9

 

On RHS,

 

? + 89

 

=> ? = ...1 - 89 = last digit is 11- 9 = 2

 

or

 

=> ? = ...9 - 89 = last digit is 9 - 9 = 0

 

Here in the options last digit 2 is option C.

Correct Answer: 121

Explanation:

Let the score be x. Then the highest score = 3x/11.

Reminder = (x - 3x/11) = 8x/11 .Next the highest score = 3/11 of 8x/11 = 24x/121.

3x/11 - 24x/11 = 9 <=> 33x - 24x = 9*121 <=> x= 121..

Correct Answer: 10

Explanation:

Apply  a 3 + b 3 + c 3 - 3 a b c a 2 + b 2 + c 2 - a b - b c - c a = a + b + c

 

Hence the answer is  1.5 + 4.7 + 3.8 = 10.

Correct Answer: 200

Explanation:

Let the number  of 20 paise coins be x. Then the no of 25 paise coins = (324 - x).

0.20 * (x) + 0.25 (324 - x) = 71 => x = 200..

Correct Answer: 1134

Explanation:

$$\begin{gathered} 1 3 x ? + 4 7 x 11 4 x 539 = 31 100 x 2000 \\ ? = 378 x 3 \\ ? = 1134 \end{gathered}$$

Correct Answer: 6

Explanation:

$$\begin{gathered} ? 2 = 2 × 7 8 - 21 + 8 + 49 - 14 8 \\ = 57 - 21 \\ = 36 \\ = > ? = ± 6 \end{gathered}$$

Correct Answer: 90

Explanation:

3/5 of  350 - 4/7 of 210 = 210 - 120 = 90.

Correct Answer: Rs. 20

Explanation:

Let the Oranges be 'O', Bananas be 'B' and Apples be 'A'

From the given data,

 

2O + 3B + 4A = 15 ...... (I)

3O + 2B + A = 10 ..... (II)

On adding (I) and (II),

5O + 5B + 5A = 25

O + B + A = 5

4O + 4B + 4A = 20.

Correct Answer: 40

Explanation:

Let ? = p

38 x 7500/100  + p x 375/100 = 50 x 6000/100

=> 38 x 75 + 3.75p = 3000

=> 3.75p = 3000 - 2850

=> p = 150/3.75 

=> p = ? = 40