Explanation

Write code digits under each letter of SECRET → 102807

S → 1, E → 0, C → 2, R → 8, E → 0, T → 7.

Now encode ERRECT letter by letter:

E → 0, R → 8, R → 8, E → 0, C → 2, T → 7

So ERRECT → 0 8 8 0 2 7 = 088027.

Explanation

Tray, Plate, Spoon — all are eating/serving articles used in the kitchen.

Tooth — belongs to the human body, not a kitchen/serving item.

So Tooth is different.

Explanation

Formula:

Perimeter of semicircle = πr + 2r

Step 1:

πr + 2r = 144

→ r(π + 2) = 144

Step 2:

Take π = 3.14

→ r(3.14 + 2) = 144

→ r × 5.14 = 144

→ r = 144 ÷ 5.14 = 28.01 cm

Explanation

The given ratio is 16:24, which can be simplified as 2:3 (by dividing both numbers by 8).

To maintain the same ratio, we need to find the number that will maintain the 2:3 ratio with 72.

Let's multiply 72 by 2/3:

(2/3) × 72 = 48

So, the correct answer is: 48

The ratio 16:24 is equivalent to 2:3, and similarly, the ratio ? : 72 is equivalent to 2:3, which leads to the answer 48.

Explanation

3x - 15 - 6 = 0

3x = 21

X = 21/3

X = 7

Explanation

Step 1: 332% means 332 per 100 → so,

332% of 2113 = 332×2113/100 = 7015.16

Step 2: Now divide by 42 →

7015.16 ÷ 42 = 167.03

Explanation

Explanation

Explanation

Given:

5% of A = 15% of B → 0.05A = 0.15B → A = 3B

10% of B = 20% of C →0.10B = 0.20C → B = 2C

Now, C = 2000

→ B = 2 × 2000 = 4000

→ A = 3 × 4000 = 12000

Total income = A + B + C = 12000 + 4000 + 2000 = 18000

Explanation

He sold 20 articles for Rs. 60 and gained 20%.

Let C.P. of 1 article = x

Then, S.P. of 1 article = x × 1.2

So for 20 articles:

20 × 1.2x = 60

→ x = 60/24 = 2.5

Thus, cost of 1 article = Rs. 2.5

Now, how many articles can he buy for Rs. 60?

60 ÷ 2.5 = 24