Mathematical Operations And Symbol Notations
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In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation.
3 x 4 x 5 = 435, 4 x 3 x 2 = 342, 2 x 3 x 4 = ?
-
324
-
242
-
432
-
243
A.
324
See the pattern:
3 x 4 x 5 = 435, (write second digit on first place and first digit on second place and third digit remains unchanged).
Similarly,
2 x 3 x 4 = 324 (write second digit on first place and first digit on second place and third digit remains unchanged).
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A*B means multiply A by B; A@B means divide A by B, A ? B means add B to A and A=B means subtract B from A. Then find the value of 10*10 = 5*10 ? 50 @10.
-
100
-
45
-
1000
-
55
D.
55
10*10 = 5*10 ? 50 @ 10
After interchanging + and −, 8 and 7, which one of the following becomes correct?
-
8 − 7 + 3 x 5 = 35
-
8 x 2 + 7 − 6 = 9
-
7 x 8 + 6 − 9 = 25
-
6 + 8 x 2 − 7 = 0
D.
6 + 8 x 2 − 7 = 0
As in option (d), we can see.
6 + 8 x 2 − 7 = 0
6 − 7 x 2 + 8 = 0
If '+' means 'x' , '−' means '÷' 'x' means '−' and '÷' means '+', then find the value of the following equation.
6 + 64 − 8 ÷ 45 x 8
-
85
-
76
-
87
-
75
A.
85
Given equation
6 + 64 − 8 ÷ 45 x 8
Now, changing the sign as per the instruction
6 x 4 ÷ 8 + 45 − 8
If '+' means subtraction, '÷' means addition, '<' means multiplication and '>' means division, then find the value of the given statement, 9 ÷ 7 < 8 > (4>2) + 5
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32
-
18
-
16
-
11
A.
32
9 ÷ 7 < 8 > (4>2) + 5
On changing signs,
= 9 + 7 x 8 ÷ (4 ÷ 2) - 5
= 9 + 7 x 8 ÷ 2 - 5
= 9 + 7 x 4 - 5
= 9 + 28 - 5
= 37 - 5 = 32
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Mock Test Series
Mock Test Series