Question
How many composite numbers are there from 21 to 30?
✓
Answer
Total number of composite numbers from 21 to 30 is 8.
They are 21,22,24,25, 26, 27, 28, 30.
They are 21,22,24,25, 26, 27, 28, 30.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Are all whole numbers also natural numbers?
Following pictograph shows the number of tractors in five villages:
What is the total number of tractors in all the five villages$?$
→| Villages | Number of tractors  $- 1$ Tractor |
| Village $A$ |  |
| Village $B$ |  |
| Village $C$ |  |
| Village $D$ |  |
| Village $E$ |  |
Fill in the blanks to make the following a true statement: $785 \times 0 =$ _
→Write all prime numbers between:
10 and 50
10 and 50
Using the number line, write the integer which is: $6$ more than $2$
→Explain the following terms: Obtuse triangle.
Write all integers between: $0$ and $3$
→State whether the following statement is true or false: A pentagon with more than one line of symmetry must be regular.
Write $‘T’$ for true and $‘F’$ for false in case of the following statements: Every point has a size.
→There is a natural number which when added to a natural number, gives the natural number itself.