Number Sequence | MCQs

Explanation

Table of 19 has a pattern for every ten multiples. Consider the first 10 multiples of 19, i.e. 19, 38, 57, 76, 95, 114, 133, 152, 171 and 190.

ND18-9-2023

Explanation

The pattern of the number series appears to be an increase of 5, 4, 9, 13, ... , which suggests an increase of 4, then 9, then 13, and so on.

Therefore, the next increase would be 15, which adds up to 57.

Here's the completed series:

4, 9, 13, 22, 35, 57

Explanation

The series is obtained by multiplying the previous term by a increasing sequence of numbers:

• 2 × 2 = 4
• 4 × 3 = 12
• 12 × 4 = 48
• 48 × 5 = 240
• 240 × 6 = 1440

Explanation

Explanation

The pattern of the series appears to be square numbers:

• 1 = 1^2
• 9 = 3^2
• 25 = 5^2
• 49 = 7^2
• 81 = 9^2
• 121 = 11^2

So, the correct completion of the series would be:

1, 9, 25, 49, 81, 121

Explanation

The pattern of the series is:

+3, +7, +11, +15, +19...

So, the next difference should be +23:

57 + 23 = 80

The correct answer is 80.

Explanation

all numbers are double except 96

64+64 = 128

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Explanation

The sum of five numbers is 555.

The average of the first two numbers is 75, so their sum is 2 x 75 = 150.

The third number is 115.

So, the sum of the first three numbers is 150 + 115 = 265.

Since the sum of all five numbers is 555, the sum of the last two numbers is 555 - 265 = 290.

Therefore, the average of the last two numbers is 290 / 2 = 145.

The correct answer is: 145

Explanation

ND-6-09-2023

Explanation

When 20% of itself is added to the number, it gives 102, so we can set up the equation:

x + (20% of x) = 102

To find 20% of x, multiply x by 0.20:

x + 0.20x = 102

Combine like terms:

1.20x = 102

Divide both sides by 1.20:

x = 102 / 1.20

x = 85

So, the correct answer is: 85