Question

17. Observe the number pattern below. Sum of 3 consecutive counting numbers is 3 times the middle number. 1+ 2+ 3 = 6 2 + 3 + 4 = 9 3 +4 + 5 = 12 (a) Write the next two lines? (2) (b) Find the sum of first 5 consecutive counting numbers? (1) (c) Find the sum of 5 consecutive numbers from 2 onwards. (1) (d) What about the sum of 5 consecutive numbers. (1) (e) Find the sum of natural numbers from 1 to 11 with the help of the pattern. (1)​

Answer 1

Step-by-step explanation:

ans a.) 4+5+6=15

5+6+7 =18

ans b.) 1+2+3+4+5=15

ans c.) 2+3+4+5+6=20

ans d.) sum of first five consecutive numbers are 15

ans e.) 1+2+3+4+5+6+7+8+9+10+11=66