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Mathematical Operations

Important Instructions
21.

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.

15 x 26 = 6512

29 x 36 = 6923,

46 x 54 = ?

Answer: B

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22.

If "A" denotes "subtracted from", "B" denotes "added to", "C" denotes "divided by", "D" denotes "multiplied by", then which of the following statement is correct?

Answer: C

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23.

In the following question, correct the equation by interchanging the two signs.
6 ÷ 17 x 51 + 6 – 12 = – 4

Answer: A

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24.

If "–" means "divided by", "+" means "multiplied by", "÷" means "added to", "x" means "subtracted from", then 11 ÷ 6 – 2 + 5 x 3 = ?

Answer: C

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25.

If 324⊕289 = 35, 441⊕484 = 43, then 625⊕400 = ?

Answer: D

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26.

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

72 x 9 - 14 + 2 = ?

Answer: D

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27.

 

If (–) stands for division, (+) stands for multiplication, (÷) stands for subtraction and (×) stands for addition, which one of the following equations is correct?

Answer: A

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28.

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
642 x 6 ÷ 25 + 4 = ?

Answer: D

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29.

If the signs + and / and the numbers 2 and 4 are interchanged, which one of the following four equations would be correct?

Answer: D

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30.

If '+' means subtraction, '÷' means addition, '<' means multiplication and '>' means division, then find the value of the given statement,

The value of 9 ÷ 7 < 8> (4>2) + 5 will be

Answer: A

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