Question

How many three digital numbers are divisible by 7

Answer 1

$\bold{ĀNSWĒR}$




Three digit numbes divisible by 7 are


105 , 112,126 ---------- 994

a= 105

common difference (d) = a2 -a1 = 112 - 105 = 7

an = 994

Using the formula of A.P i.e

an= a+ (n-1)d

994 = 105 +(n-1)7

994 = 105 + 7n -7

994 = 98 + 7n

994 -98 = 7n

896 = 7n

n= 128

Hence, there are 128 three digit numbers divisible by 7


Thanks ❤^_^


#RÔYÂL CHÔRÎ ♥

Answer 2

plz refer to this attachment