As per your concern I will get the placement paper of Hindustan Aeronautics Limited (HAL) so that you can have idea.

Here is the paper

Qn.1 A tank has 2 pipes A and B which can fill a tank in 4 hrs and 6 hrs respectively. Another pipe C can empty the tank in 4 hrs. A man wanted to set a timer which should open the pipe C after the tank is half filled, but by mistake sets it to open when the tank is one fourth empty. The man was supposed to reach the place at the same time as the tank fills. How late was the man to reach the spot? (Pipes & Cisterns)

24 minutes

36 minutes

48 minutes

54 minutes
Answer:
54 minutes

Qn.2 Ajay has a four digit sum of money. If he is able to divide it among his 22 friends and himself equally when he spends Rs.19, what is the maximum possible amount with Ajay initially?

9978
Answer:
9978

Qn.3 Consider the sum of first 70 natural numbers. If every digit '6' is replaced by '8' what would be the net increase and the new sum?

16 & 2501
Answer:
16 & 2501

Qn.4 3 blocks are chosen randomly on a chessboard. What is the probability that they are in the same diagonal?

3/452

4/564

1/372
Answer:
1/372

Qn.5 What is the area of the triangle ABC with A(e,p) B(2e,3p) and C(3e,5p)? where p = PI (3.141592654)

6.5467

8.3468

0
Answer:
0

Qn.6 Silu and Meenu were walking on the road.Silu said, "I weigh 51 Kgs. How much do you weigh?"Meenu replied that she wouldn't reveal her weight directly as she is overweight. But she said, "I weigh 29 Kgs plus half of my weight."How much does Meenu weigh?

60

56

59

58
Answer:
58

Qn.7 Consider the sum: ABC + DEF + GHI = JJJ .If different letters represent different digits, and there are no leading zeros, what does J represent?

5

6

8

9
Answer:
9

Qn.9 Consider two cars A and B. Speed of A is 10 Kmph. Speed of B is 3 times faster than that of A. What will be the ratio of time taken by B to cover the same distance as that of A.

2/5

1/3
Answer:
1/3

Qn.10 The ratio of Rita's age to her mother's age is 3:8. The difference of their ages is 35 years. The ratio of their ages after 4 years will be ------ .

3:11

5:12
Answer:
5:12

Qn.11 m*n^2 * ( m + n^2 ) = 2^13 . Solve for m and n by deduction.

4 & 16
Answer:
4 & 16

Qn.12 The total number of digits in all the page numbers, of a book I am reading now, is 1689 . How many pages does my Book have ?
479

527

599

608


Qn.13 Using two 2's and two 3's and using a maximumm of three mathematical signs, symbols, can you have a result in between 14 and 15 ?

13.5

12

14

14.5
Answer:
14.5

Qn.14 If one-seventh of a number exceeds its eleventh part by 100 then the number is...

770

1100

1825

1925
Answer:
1925

Qn.15 1!*2!*3!*4!* 5!*6!*... ......... ......100! . Find the number of zero?

1020

1220

1460

1520

Qn.16 a*b*c*d*e + b*c*d*e*f + a*c*d*e*f + a*b*d*e*f + a*b*c*e*f + a*b*c*d*f = a*b*c*d*e*f and a,b,c,d,e and f are all positive no repeating integers then Solve a,b,c,d,e, and f

2, 6. 16.36,125

2,3,9,27,81,162

3.9,27,100,144

3,9,36,121,169

Qn.17 729 ml of a mixture contains milk and water in ratio 7:2. How much of the water is to be added to get a new mixture containing half milk and half water?

79 ml

81 ml
Answer:
81 ml

Qn.18 What is the 28383rd term in the series 1234567891011121314............

3
Answer:
3

Qn.19 If 1.5x=0.04y then the value of (y-x)/(y+x) is

730/77

73/77
Answer:
73/77

Qn.20 The smallest number which when diminished by 3 is divisible by 21,28,36 and 45 is...

869

859

4320

1263
Answer:
1263