2
Q:

$854*854*854-276*276*276854*854+854*276+276*276=?$

 A) 546 B) 578 C) 607 D) None of these

Answer:   B) 578

Explanation:

Given exp . is like this $854*854*854-276*276*276854*854+854*276+276*276=?$

so ans = 854 - 276 = 578

Q:

7, 16, 36, 78, 144, ?

which number come in place of question mark

 A) 168 B) 196 C) 222 D) 256

Answer & Explanation Answer: C) 222

Explanation:
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0 104
Q:

Which of the following is a rational number?

 A) 0.241 B) 1.732 C) 4 D) All of the above

Answer & Explanation Answer: C) 4

Explanation:

Any number which can be expressed as a fraction of two integers like P & Q as P/Q where Q is not equal to zero.

Every integer is a rational number since Q can be 1.

Hence, in the given options, 4 can be expressed as a simple fraction as 4/1. And all other options cannot be expressed as fractions.

Hence, 4 is a rational number in the given options.

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1 328
Q:

Which expression is equivalent to $i233$?

 A) i B) 1 C) -i D) -1

Answer & Explanation Answer: A) i

Explanation:

We know that,

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3 876
Q:

The product of a number and its multiplicative inverse is

 A) 1 B) 0 C) -1 D) Infinity

Answer & Explanation Answer: A) 1

Explanation:

The mutiplicative inverse of a number is nothing but a reciprocal of a number.

Now, the product of a number and its multiplicative inverse is always equal to 1.

For example :

Let the number be 15

Multiplicative inverse of 15 = 1/15

The product of a number and its multiplicative inverse is = 15 x 1/15 = 1.

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2 631
Q:

25 divided by 7

 A) 3.571 B) 35.71 C) 0.351 D) 0.0357

Answer & Explanation Answer: A) 3.571

Explanation:

Here we have 25 divided by 7.

25 will not go directly in 7

Hence, we get the result in decimals.

25/7 = 3.571.

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3 594
Q:

Which of the following is not a prime number?

 A) 5 B) 11 C) 21 D) 37

Answer & Explanation Answer: C) 21

Explanation:

A prime number is a whole number greater than 1 whose only factors are 1 and itself.

Factors of 5 are 1, 5

Factors of 11 are 1, 11

Factors of 21 are 1, 3, 7, 21

Factors of 37 are 1, 37.

Hence, according to the definition of a prime number, 21 is not a prime number as it has more than two factors.

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2 410
Q:

What are the Multiples of 4?

Answer

The Multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40 upto 40. Mutiples of 4 means which can be divided by 4 leaving remainder '0'.

Common Multiples of 4 & 6 are 12, 24, 36, 48, 60 upto 60.

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952
Q:

The sum of three consecutive odd numbers is 93. What is the middle number?

 A) 31 B) 33 C) 29 D) 27

Answer & Explanation Answer: A) 31

Explanation:

Let the three consecutive odd numbers be x, x+2, x+4

Then,

x + x + 2 + x + 4 = 93

=> 3x + 6 = 93

=> 3x = 87

=> x = 29 => 29, 31, 33 are three consecutive odd numbers.

Therefore, the middle number is 31.

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9 2346