Product of Two Consecutive Even or Odd Natural Numbers

Q.

find the following product 43x45?

1. 1935

2. 1835

3. 2115

4. 2025

Q. Which of the following numbers can be written in the form $2^n$, where $n$ is a natural number?

1. 40
2. 64
3. 120
4. 256
5. 8
6. 20
7. 32
8. 84
9. 24
10. 512

Q. O is even number or odd number

Q.

sum of first 50 even numbers?

sum of first 50 prime numbers?