Question

find the sum of all two digit number which are multiples of 2 or 3​

Answer 1

Answer:

answer is 12=3,24=6...... and so on.

Answer 2

Answe

4905

Step-by-step explanation:

by using arithmetic progression,f

sum of n terms=n (2a+(-1)d)d)/2

we're,

n-no .if terms

a-first term in the series.

d-common diffence between the tems

here,a=10,d= - 1 n= 90

S - 90 (20+(90+1) 1/2

= 90 (20+89) /2

= 90 (109/2

= 4505