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

The smallest number of 5 digits beginning with 3 and ending with 5 will be 30005

Step-by-step explanation:

the beginning is 3 and the end is 5.

the middle numbers must be the smallest number i.e., 000

Sh24-8-2023

Explanation

So our first 5 prime numbers are 2,3,5,7,11.

Hence, the answer is 28

Explanation

Do LCM of 18,21,and 24 ...

u will get 6*3*4*7.

So our answer is 504.

Explanation

To convert 18 (decimal) to octal:

18 ÷ 8 = 2 remainder 2

2 ÷ 8 = 0 remainder 2

Reading the remainders from bottom to top, 18₁₀ = 22₈.

Explanation

Man climbs 20 yards and slips down 5 yards in one minute

i.e. he climbs (20-5 = 15 yards) in one minute.

But in the last minute, he will be climbing 20 yards as he gets on the top so no slip.

Time taken to climb 80 yards = 60/15 + 1

                                                   = 5 minutes.

He climbs the hill in 5 minutes

Explanation

Integers (like -2, 0, 3) can be written as a ratio (e.g., -2 = -2/1), so they are part of rational numbers.

Rational numbers include all numbers that can be expressed as p/q, where q ≠ 0.

Explanation

 1/4 of 1/2 of 1/5 of 200

= 1/4 of 1/2 of  [(1/5) × 200]

= 1/4 of 1/2 of  40

= 1/4 of  [(1/2) × 40]

= 1/4 of 20

= (1/4) × 20

= 5

Explanation

Prime factors:

 • 36 = 2² × 3²

 • 54 = 2 × 3³

 • 360 = 2³ × 3² × 5

Common prime factors are 2 × 3² = 18.

Explanation

Multiply 1397 and 1397 to get 1951609.