Question

ver. Is 1000 also a square number? If not, why?
3. Study the following pattern:
1 = 12
1+ 3 =2²
1+ 3 + 5 = 3²
1 + 3 + 5 + 7 = 42
Find the sum of (i) the first 10 odd natural numbers: (ii) the first 20 odd natural numbers,
4. Write the triangular numbers.​

Answer 1

Step-by-step explanation:

1000 is not a square number

1000 is not a square numbersquare number never end with odd number of zeroes

3.

1 =1²

1+ 3 =2²

1+ 3 + 5 = 3²

1 + 3 + 5 + 7 = =4²

Find the

(i) sum the first 10 odd natural numbers:=10²= 100

(ii) sum of the first 20 odd natural numbers,=20²= 400