Explanation

A number is divisible by 8 if its last three digits form a number that is exactly divisible by 8.

For example, 4,320 is divisible by 8 because 320 ÷ 8 = 40 (a whole number).

Explanation

1 milligram (mg) = 10⁻⁶ kilograms (kg)

So, 20 milligrams equals:

20 mg = 20 × 10⁻⁶ kg

Which simplifies to:

2 × 10⁻⁵ kg

Explanation

The harmonic mean is the reciprocal of the arithmetic mean of the reciprocals of the data points.

It is calculated as the inverse of the average of the inverses of the values.

Explanation

Explanation

The square root of 256 is 16, which has 2 digits.

Counting the digits in 16 confirms that the answer is 2.

Explanation

To solve the equation:

5/6 ÷ 5/9

When dividing by a fraction, multiply by its reciprocal:

5/6 × 9/5 = 9/6

Simplify the fraction:

9/6 = 3/2

Explanation

To evaluate the expression, follow the order of operations:

Multiply 3 and 3: 3 * 3 = 9

Add 3 and 9: 3 + 9 = 12

Subtract 3 from 12: 12 - 3 = 9

Add 3 to 9: 9 + 3 = 12

The correct answer is: 12

Explanation

To find the halfway point:

103 + 301 = 404

404 / 2 = 202

So, the correct answer is 202.

Explanation

A non-terminating, non-recurring decimal cannot be expressed as a fraction.

It is the key characteristic of an irrational number.

Explanation

1,5,9,13, ---- 40th

d=5-1=4 d=9-5=4 =1+(40-1)*4 =1+156 =157

U have to use the formula S=n/2 [2a+(n-1)d]

S=40/2[2(1)+(40-1)4]

S=20[2+(39)4]

S=20[156]

S=3160

ND-8-08-2023