## How do you write a good true/false question?

Suggestions for writing true/false questions

1. Include only one main idea in each item.
2. As in multiple choice questions generally, use negatives sparingly.
3. Try using in combination with other material, such as graphs, maps, written material.
4. Use statements which are unequivocally true or false.

## How many different ways can a n Questions True False test can be answered?

Each question can be answered 2 different ways, and the answer for one question has no effect on the answer for another (they are independent events).

## How many ways can you answer 10 true/false questions?

Extending this to ten questions, there are 210 ways to answer all ten questions, 10×29 for answering all but one question, 45×28 ways of answering all but two questions, etc, giving a total of (2+1)10=310.

## How many pairs can you make with 6?

It’s the same as possibilities to a 6 digit code with known numbers and no repeats. With 1 item there are 6 possibilities with 2 you only have 5 choices after the first if you don’t repeat the same item. So for 6 items the equation is as follows 6*5*4*3*2= 720 possible combinations of 6 items.

## How many pairs can you make with 5 numbers?

Assuming no five-digit number can begin with zero, there are 9 possible choices for the first digit. Then there are 10 possible choices for each of the remaining four digits. Therefore, you have 9 x 10 x 10 x 10 x 10 combinations, or 9 x 10^4, which is 90,000 different combinations.

000

## How many unique 7 digit numbers are there?

So total number of 7 digit numbers=9999999 – 1000000+1). Out of 9000000 numbers, 4500000 are having the sum of digits as even and the remaining 4500000 are having the sum of digits as odd. Every alternate number has its sum of digits even and odd. There are 9000000 seven digit numbers.

100000

## How many 8 digit numbers are there in all?

Do you know how many 8-digit numbers are there in all? Answer: There are nine crore 8-digit numbers in all.

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999

320

## How many numbers in the range 100 999 have no repeated digits?

Answer. the total number of even numbers from 100 to 999 with no digits repeated is 100 + 180 + 48 = 328.

## How many numbers are there between 100 and 999 in which all three digits are different?

hence we have 9x10x5 such numbers. ans:450. Find how many numbers between 100 and 999 can be formed with the digits 0, 4, 5, 6, 7, and 8, with no digit being used more than once. How many of them are odd?

288

## How many even natural numbers are there between 100 and 1000 with all distinct digits?

How many even integers between 100 and 1000 have distinct digits? But the answer of exercise is 328.

25 numbers

## How many numbers between 100 and 1000 have the digit 7 exactly once?

Hence, the numbers between 100 and 1000 having the digit 7 exactly once are 72 + 72 + 81 = 225.

## How many even numbers are there between 1 and 1000?

In case of numbers from 1 to 1000, there are 500 odd numbers and 500 even numbers.