Explanation

Average of numbers from 1 to 40

For consecutive numbers, average = (First + Last) / 2

= (1 + 40) / 2

= 41 / 2

= 20.5

Last verified on 01-09-2026

Explanation

Work done by A in 1 day = 1/12  

Work done by B in 1 day = 1/24  

Work done by A + B in 1 day = 1/12 + 1/24  

= 2/24 + 1/24  

= 3/24  

= 1/8  

So together they complete 1/8 of the work in 1 day.  

Time to complete whole work = 1 / (1/8) = 8 days

Last verified on 11-07-2026

Explanation

Average = Sum of all numbers / Total number of numbers

Given numbers: 15, 21, 18

Total number of numbers = 3

Sum = 15 + 21 + 18 = 54

Average = 54 / 3 = 18

Last verified on 24-08-2026

Explanation

Let's calculate using the capital × time method:

• A: 15,000 × 24 = 360,000
• B: 20,000 × 24 = 480,000
• C: 20,000 × 18 = 360,000

Profit ratio = 360,000: 480,000: 360,000

Simplify:
3 : 4 : 3

Total parts = 3 + 4 + 3 = 10

B's share = $frac{4}{10} times 25,000$

= Rs. 10,000

Explanation

20×1/3​

Multiply 20 by the numerator:

=20/3​

Divide 20 by 3:

=6x 2/3​