Explanation

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

• Multiply 2 and 25: 2 × 25 = 50
• Divide 50 by 5: 50 ÷ 5 = 10
• Add 10: 10 + 10 = 20
• Subtract 2: 20 - 2 = 18

So, the correct answer is: 18

Explanation

27 – 21 = √?  + 1

6 = √25 + 1

6 = 5 + 1

6 = 6

Explanation

Given ratio: 50 paisa:1 rupee:2 rupee = 2:5:8

Let's assume the number of coins of each denomination are:

50 paisa = 2x

1 rupee = 5x

2 rupee = 8x

Total amount = Rs. 352

The value of coins is:

50 paisa coins = 2x * 0.50 = Rs. x

1 rupee coins = 5x * 1.00 = Rs. 5x

2 rupee coins = 8x * 2.00 = Rs. 16x

Adding these values, we get:

x + 5x + 16x = 352

Combine like terms:

22x = 352

Divide by 22:

x = 16

Now, find the total number of coins:

50 paisa coins = 2x = 2(16) = 32

1 rupee coins = 5x = 5(16) = 80

2 rupee coins = 8x = 8(16) = 128

Total number of coins = 32 + 80 + 128 = 240

So, the correct answer is: 240

Explanation

1 kilometre is equal to 1000 metres.

Explanation

Cost Price (CP) = Rs. 5000  

Selling Price (SP) = Rs. 4000  

Loss = CP − SP = 5000 − 4000 = Rs. 1000

Loss % = (Loss / CP) × 100  

= (1000 / 5000) × 100  

= 20%

Explanation

The pattern of the series is:

+1, +2, +3, +4, +5...

So, the next difference should be +6:

16 + 6 = 22

The correct answer is 22.

Explanation

To find the average, we need to first convert each fraction to a decimal:

 5/6 = 0.83

 4/3 = 1.33

 3/4 = 0.75

Then, add the decimals and divide by the number of values:

 0.83 + 1.33 + 0.75 = 2.91

 2.91 ÷ 3 = 0.97

Now, convert the average back to a fraction:

 0.97 ≈ 35/36

Explanation

Series: 64, 48, 40, 36, 34, ?

Now find the differences between consecutive terms:

- 64 → 48: -16  

- 48 → 40: -8  

- 40 → 36: -4  

- 36 → 34: -2

You can see the differences are decreasing: -16, -8, -4, -2...

Next difference: -1

So, 34 - 1 = 33

Explanation

1 square foot = 12 inches × 12 inches = 144 square inches

Explanation

3/1000 is already a fraction.

To convert it to a decimal:

3/1000 = 0.003