Explanation

The sum of 72 + 21 + 8 + 66 + 37 equals 204.

Explanation

40 multiplied by 5.1 equals 204.

Explanation

21 × 18 = 378

Explanation

The sequence is formed by adding 10, then 20, then 40, and so on, increasing the increment by 10 each time:

1 + 10 = 11

11 + 20 = 31

31 + 40 = 71

71 + 80 = 151

Explanation

The sequence is obtained by multiplying the previous term by 2:

2 × 2 = 4

4 × 4 = 16

16 × 8 = 128

128 × 16 = 2048

Explanation

To simplify the expression, we need to follow the order of operations (PEMDAS):

• Divide 4 by 2: 4 ÷ 2 = 2
• Multiply 2 by 3: 2 × 3 = 6
• Subtract 6: 6 - 6 = 0
• Add 2: 0 + 2 = 2

So, the correct answer is: 2

Explanation

The given series is formed by adding 1, 4, 9, 16, 25, and 36 (which are consecutive perfect squares) to the previous term. Breaking it down:

• 1 + 1 = 2
• 2 + 4 = 6
• 6 + 9 = 15
• 15 + 16 = 31
• 31 + 25 = 56

56 + 36 = 92 (not 91)

So, the correct series would be: 1, 2, 6, 15, 31, 56, 92.

Therefore, the wrong number in the series is 91.

Explanation

Using the order of operations (PEMDAS), we get:

Evaluate the expression inside the parentheses:

• 2 × 5 = 10
• 13 - 10 = 3

Now, multiply 12 by the result:

• 12 × 3 = 36

So, the correct answer is 36.

Explanation

Cost Price of 56 kg rice = Rs.

(26 × 20 + 30 × 36)

= Rs. (520+1082) = Rs.1600.

Selling Price of 56 kg rice = Rs.

(56 × 30)

= Rs. 1680.

Profit = Selling Price - Cost Price = 1680 - 1600.

Profit Percentage = Profit / Cost price × 100

= 800/1600 × 100 = 5%

Explanation

Let's examine the pattern of the given series: 2880, 480, 92, 24, 8, 4, 4.

Start by checking the relationship between consecutive numbers:

• 2880 ÷ 6 = 480
• 480 ÷ 5 = 96 (but the next number is 92, so this is where the error occurs)
• 92 ÷ 4 = 24
• 24 ÷ 3 = 8
• 8 ÷ 2 = 4
• 4 ÷ 1 = 4

The wrong number is 92.

It should be 96 for the series to follow a decreasing division pattern.