Question

I) What is the sum of all whole numbers that ends with digit 0 and lies between 99 and 299?

II) The 6th term of an arithmetic progression is 42 and the common difference is 4. What is
the first term of the AP?

Answer 1

Answer:

1) 3900

2)22

Step-by-step explanation:

1) 100+120+130+.......+290 = 3900

2) tn = a+(n-1)d

t6 = a +(6-1)4

42 = a + 20

a = 42-20 = 22