# Hello ! Welcome to your NTSE MAT - Logical Maths

Instructions:

Time: 20:00 min                                                                                                          Full Marks: 60

1. There is negative marking of -1.00 for all incorrect answers chosen.
2. There is no deduction for NOT attempted question.
3. All questions carry equal marks and all 15 questions are of 4 marks each.
4. All Questions are compulsory.

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1. If sign ‘-‘ means ‘plus’, sign ‘+’ means ‘minus’, sign ‘*’ means ‘divided by’ and sign ‘/’ means ‘multiplied by’, then simplify:

7-8*5/6+4
2. If ‘+’ stands for ‘division’, ‘-‘ stands for ‘equal to’, ‘*’ stands for ‘addition’, ‘/’ stands for ‘greater than’, ‘=’ stands for ‘less than’, ‘>’ stands for ‘multiplication’ and ‘<’ stands for ‘subtraction’, then which of the following alternatives is correct?
3.

1. Manipulate the symbol and find the missing member

If 3*6=18

4*7=22

9*1=20

Then 5*2=?
4. DIRECTIONS:  on the basis of the assumption that ∆ means ‘square the first number and multiply by the next number’, ≈ means ‘subtract the second number from the product of the two numbers’.

1. (2∆3)∆0 is equal to

5. DIRECTIONS: On the basis of the assumption that ∆ means ‘square the first number and multiply by the next number’, ≈ means ‘subtract the second number from the product of the two numbers’.

(5≈3)∆3 is equal to:
6. DIRECTIONS:  on the basis of the assumption that

a∆b∆c does not imply

7. DIRECTIONS: On the basis of assumption that

a□b∆c implies that

8.

then which one of the following would be a correct or proper inference?

2x*y and x#0

9.

then which one of the following would be a correct or proper inference?

10.

then which one of the following would be a correct or proper inference?
11.

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15.

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