NARAYANA IIT ACADEMY
MENTAL ABILITY
1. If means , means and means , then find the value of
a. 26 b. 6 c. 14 d. 15
2. If means , means , means and means then find the value of
a. 45 b. 48 c. 35 d. None of these
3. If means , means , means and means , then find the value of
a. 6 b. 4 c. 8 d. 2
4. Interchange the symbols and , and the number 15 and 18. Find the correct alternative:
a. b.
c. d.
Direction(5 to 14 ) : The given equation becomes correct when symbols are interchanged as given in
the one of the option. Find correct option:
5.
a. b. c. d.
6.
a. 3 and 1 b. 15 and 5 c. 15 and 16 d. 3 and 5
7.
a. b. c. d.
8.
a. b. c. d.
9.
a. b. c. d.
10.
a. b. c. d.
11.
a. b. c. d.
12.
a. b. c. d.
13.
a. b. c. d.
14.
a. b. c. d.
Topic : CODING OF ARITHMETIC SIGNS
Direction(15 to 19 ) : The given equation becomes correct when symbols and numbers are
interchanged as given in the one of the option. Find correct option:
15. Symbols , Numbers 14 and 6
a. b. c. d.
16. Symbols , Numbers 5 and 16
a. b.
c. d.
17. Symbols , Numbers 20 and 15
a. b.
c. d.
18. Symbols , Numbers 2 and 8
a. b.
c. d.
19. Symbols , Numbers 2 and 8
a. b.
c. d.
Direction(20 to 22 ) : Interchange the numbers 2 and 8 as well as the signs and Find correct
option:
20.
a. 800 b. 400 c. 200 d. 100
21. find the value of x
a. 0.1 b. 0.5 c. 4 d. 1
22.
a. b. c. d.
Direction(23 to 26 ) : the sign marked (*) stands for different mathematical signs. The mathematical
signs in the proper sequence are given in the alternative. When (*) is replaced by the mathematical sign
given in one alternative, in the same sequence, the equation becomes correct. Find the correct
alternatives.
23. 18 * 18 * 2 * 9
a. b. c. d.
24. 7*8*5*3
a. b. c. d.
25. 18 * 6 * 2 * 5
a. b. c. d.
26. 9*3*4*3
a. b. c. d.
Topic : CODING OF ARITHMETIC SIGNS
Direction (27 to 31) : Mathematical symbols (sign) are missing between the number. The missing
symbols in proper sequence are given in the alternatives. When the symbols given in one of the
alternatives are inserted between the numbers in the same sequence, the equation becomes correct.
Find the correct alternative.
27. (69 23) (76 19 6) =30
a. b. c. d.
28. (9 6 36 9) 10 = 5
a. b. c. d.
29. 69 23 111 37 1 = 10
a. b. c. d.
30. (8 7) (78 6) =62
a. b. c. d.
31. (13 9) (14 11) 13 = 3
a. b. c. d.
32. 2+(91÷7)+82+59=?
a. 156 b. 125 c. 446 d. 664
33. If ‘A’ denotes +, ‘B’ denotes ,’C’ denotes – and ‘D’ denotes then what is the value of
5B9A7C9D3A6
a. 55 b. 54 c. 45 d. 50
34. If ‘A’ denotes +, ‘B’ denotes ,’C’ denotes – and ‘D’ denotes then what is the value of
18 C 14 A 6 B 16 D 4
a. 63 b. 288 c. 254 d. 1208
35. If ‘P’ denotes +, ‘Q’ denotes ,’S’ denotes – and ‘R’ denotes then what is the value of
44 Q 9 R 12 S 6Q 4 P 16
a. 36 b. 24 c. 25 d. 12
36. If ‘P’ denotes , ‘Q’ denotes ,’R’ denotes + and ‘S’ denotes then what is the value of
18 Q 12 P 4 R 5 S 6
a. 95 b. 53 c. 51 d. 57
37. If ‘A’ denotes , ‘B’ denotes ,’C’ denotes – and ‘D’ denotes then what is the value of
4 D 16 A 5 B 8 C 5
a. 9 b. 16 c. 13 d. 7.5
38. If means , means , means and means , then find the value of
a. -14 b. -41 c. -40 d. -12
39. If means means , means and means , then find the value of
a. 5 b. -3 c. 1 d. -1
40. Which of the following interchange of signs would make the given equation correct?
a. b. c. d.
Topic : CODING OF ARITHMETIC SIGNS
