Question 13 Marks
Observe the following pattern and answer the questions that follow :
1 + 2 + 3 + 4 + 5 = 15$\quad$ 2 + 3 + 4 + 5 + 6 = 20 $\quad$3 + 4 + 5 + 6 + 7 = 25
(i) By which number should we multiply the middle number to get the sum?
(ii) Write the row of the pattern which gives the sum as 75.
(iii) Can there be any row of the pattern which gives the sum as 92?
1 + 2 + 3 + 4 + 5 = 15$\quad$ 2 + 3 + 4 + 5 + 6 = 20 $\quad$3 + 4 + 5 + 6 + 7 = 25
(i) By which number should we multiply the middle number to get the sum?
(ii) Write the row of the pattern which gives the sum as 75.
(iii) Can there be any row of the pattern which gives the sum as 92?
Answer
View full question & answer→(i) 5
(ii) 13 + 14 + 15 + 16 + 17
(iii) No, since the sum is a multiple of 5, and 92 is not a multiple of 5.
(ii) 13 + 14 + 15 + 16 + 17
(iii) No, since the sum is a multiple of 5, and 92 is not a multiple of 5.