Question

16 + 17 + 18 + 19 +..... 40 Tak ka Maan kya hoga​

Answer 1

Answer:

25

Step-by-step explanation:

an=a+(n-1)d

40=16+n-1

40=15+n

n=25

Answer 2

Answer:

700

Step-by-step explanation:

sum of n numbers = n(n+1)/2

therefore sum of 40 no.s= 40*41/2= 820

sum of 15 no.s = 15*16/2 = 120

16+17+18+....+40= sum of 40 no.s -