If the mean of numbers 28, x, 42, 78 and 104 is 62, what is the mean of 48,62,98,124 and x?

397 × 397 + 104 × 104 + 2 × 397 × 104 = ?

A

250001

B

251001

C

260101

D

261001

There are 4 consecutive odd numbers (x₁, x₂, x₃ and x₄) and three consecutive even numbers (y₁, y₂ and y₃). The average of the odd numbers is 6 less than the average of the even numbers. If the sum of the three even numbers is 16 less than the sum of the four odd numbers, what is the average of x₁, x₂, x₃ and x₄?

A

30

B

38

C

32

D

34

Consider the given question and decide which of the following statements is sufficient to answer the question. All natural numbers are whole numbers?
(I) All natural numbers plus 0 are called whole numbers (II) Whole numbers are different from natural numbers

A

Neither (I) nor (II) is sufficient to answer the question

B

(II) alone is sufficient while (I) alone is not sufficient to answer the question

C

(I) alone is sufficient while (II) alone is not sufficient to answer the question

D

Both (I) and (II) are sufficient to answer the question

৬৪ কে ৭ঃ৮ অনুপাতে হ্রাস করলে নতুন সংখ্যা হবে__

A

৫৪

B

৫৬

C

৫৮

D

৬০

Sum of 4 consecutive even numbers is greater than three consecutive odd numbers by 81 . If the sum of the least odd and even numbers is 59 then find the sum of largest of odd and even numbers is 59 then find the sum of largest odd and even numbers.

A

69

B

53`

C

65

D

72

Of three positive numbers, the ratio of the first and second numbers is 3:4 & that of the second and third numbers is 5:6. The product of the second and third numbers is 4320. What is the sum of three numbers?

A

167

B

177

C

187

D

197

In a set of three numbers, the average of first two numbers is 2. The average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers ?

A

3

B

6

C

9

D

24

In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?

A

2

B

2.5

C

3

D

3.5

If the arithmetic mean of two numbers is 7 and the geometric mean of the same two numbers is 2√10. Then find the numbers x and y respectively, such that x>y.

A

4, 10

B

2, 5

C

5, 2

D

10, 4

When 15 is included in a list of natural numbers, their mean is increased by 2. When 1 is included in this new list, the mean of the numbers in the new list is decreased by 1. How many numbers were there in the original list?

A

4

B

5

C

6

D

8