Explanation

To calculate:

"Divided 30 by half" means 30 / 0.5 = 30 × 2 = 60

Now, add 10:

60 + 10 = 70

Explanation

To find the percentage of discount:

Original price per apple = Rs. 5

Sheeraz's price per apple = Rs. 4

Discount per apple = Original price - Sheeraz's price

= Rs. 5 - Rs. 4

= Rs. 1

Percentage of discount = (Discount / Original price) × 100

= (1 / 5) × 100

= 20%

Explanation

Petroleum jelly is commonly used in cosmetics for moisturizing and protecting skin.

It forms a barrier that locks in moisture, making it ideal for creams, lip balms, and lotions.

Explanation

Hydrogen is lighter than air, so a hydrogen-filled balloon experiences buoyant force that makes it rise.

This is due to Archimedes’ principle, where lighter gases are pushed upward by heavier surrounding air.

Explanation

Let's try adding each option to the words:

BROW + N = BROWN

EAR + N = EARN

TOW + N = TOWN

All three words form new words when suffixed with "N".

Explanation

A quadratic equation ax² + bx + c = 0 typically has 2 solutions, which can be:

• Two distinct real roots
• Two equal real roots (or one repeated root)
• Two complex roots

Explanation

Oyster Rocks are a group of small islands located off the coast of Karachi, near Clifton.

They fall within the territorial waters of Sindh province in southern Pakistan.

Explanation

To find the number of chairs:

Price per chair = Total price / Number of chairs

= Rs. 2136 / 8

= Rs. 267

Number of chairs = Total amount / Price per chair

= Rs. 5073 / Rs. 267

= 19

Explanation

White clothes reflect most of the sunlight and heat, keeping the body cooler.

In contrast, black absorbs most of the heat, making it warmer.

Explanation

To evaluate the expression:

20 × 15 = 300

12 ÷ 3 = 4

Now, add:

300 + 4 = 304