Question 1 :
Identify even numbers :
2, 5, 8, 9, 10, 17, 24, 26, 97, 112, 451, 640, 1024, 7895
Question 2 :
Identify odd numbers :
2, 3, 7, 10, 16, 19, 21, 34, 70, 113, 598, 648, 2401, 9487
Question 3 :
What is the smallest two-digit even number?
Question 4 :
What is the largest two-digit even number?
Question 5 :
What is the smallest three-digit odd number?
Question 6 :
What is the largest three-digit odd number?
Question 7 :
What is the smallest four-digit even number?
Question 8 :
What is the largest four-digit odd number?
Question 9 :
Write all even numbers between 9 and 25.
Question 10 :
Write all odd numbers between 20 and 40.
Question 11 :
Write all two-digit even numbers which are evenly divisible by 4.
Question 12 :
Write all two-digit odd numbers which are evenly divisible by 5.
Question 13 :
Find the sum of first 10 odd numbers.
Question 14 :
Find the sum of first 10 evven numbers.
Question 15 :
Find the sum of all odd numbers less than or equal to 15.
Question 16 :
Find the sum of all even numbers between 21 and 31.
Question 17 :
Find the difference between the largest and smallest one-digit odd numbers.
Question 18 :
Find the difference between the largest and smallest two-digit even numbers.
Question 19 :
Find the difference between the largest four-digit even number and and smallest three-digit odd number.
Question 20 :
What is the addition of two odd numbers always?
Question 21 :
What is the addition of two even numbers always?
Question 22 :
What is the addition of an even number and an odd number always?
Question 23 :
What is the product of two odd numbers is always?
Question 24 :
What is the product of two even number always?
Question 25 :
What is the product of an even number and an odd number always?
Question 26 :
What is the product of three odd numbers always?
Question 27 :
Use the following digits and form the smallest three-digit even number (each digit has to be used only once).
3, 4, 6, 7
Question 28 :
Use the following digits and form the largest three-digit odd number (each digit has to be used only once).
1, 3, 6, 9
Question 29 :
Write down one-digit odd numbers which are prime.
Question 30 :
How many even prime numbers are there?
1. Answer :
2, 8, 10, 24, 26, 112, 640, 1024
2. Answer :
3, 7, 19, 21, 113, 2401
3. Answer :
10
4. Answer :
98
5. Answer :
101
6. Answer :
999
7. Answer :
1000
8. Answer :
9999
9. Answer :
10, 12, 14, 16, 18, 20, 22, 24
10. Answer :
21, 23, 25, 27, 29, 31, 33, 35, 37, 39
11. Answer :
12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96
12. Answer :
10, 15, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95
13. Answer :
Sum of first 10 odd numbers :
= 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
= 100
14. Answer :
Sum of first 10 even numbers :
= 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20
= 110
15. Answer :
Sum of all odd numbers less than or equal to 15 :
= 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15
= 64
16. Answer :
Sum of all even numbers between 21 and 31 :
= 22 + 24 + 26 + 28 + 30
= 130
17. Answer :
Largest one-digit odd number = 9
Smallest one-digit odd number = 1
Difference :
= 9 - 1
= 8
18. Answer :
Largest two-digit even number = 98
Smallest two-digit even number = 10
Difference :
= 98 - 10
= 88
19. Answer :
Largest four-digit even number = 9998
Smallest three-digit odd number = 101
Difference :
= 9998 - 101
= 9897
20. Answer :
The addiion of two odd numbers is always an even number.
Examples :
3 + 5 = 8
17 + 21 = 38
21. Answer :
The addiion of two even numbers is always an even number.
Examples :
4 + 6 = 10
16 + 20 = 36
22. Answer :
The addition of an even number and an odd number is always an odd number :
Examples :
6 + 9 = 15
16 + 25 = 41
23. Answer :
The product of two odd numbers is always an odd number.
Examples :
3 x 7 = 21
9 x 5 = 45
24. Answer :
The product of two even numbers is always an even number.
Examples :
2 x 4 = 8
8 x 12 = 48
25. Answer :
The product of an even number and an odd number is always an even number.
Examples :
4 x 9 = 36
7 x 14 = 98
26. Answer :
The product of three odd numbers is always an odd number.
Examples :
1 x 3 x 5 = 15
5 x 7 x 9 = 315
27. Answer :
3, 4, 6, 7
Among the given digits, the smallest one is 3. The smallest three-digit even number will start with 3.
Using the given digits only once, write all possible three-digit even numbers starting with 3.
364, 374, 346, 376
In the above three-digit even numbers, the smallest one is 346.
28. Answer :
1, 3, 6, 9
Among the given digits, largest one is 9. The largest three-digit odd number will start with 9.
Using the given digits only once, write all possible three-digit odd numbers starting with 9.
931, 961, 913, 963
In the above three-digit odd numbers, the largest one is 963.
29. Answer :
3, 5, 7
30. Answer :
There is only one even prime number, that is 2.
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