Question

Is there any formulas to solve such problems, 28+35+42.........+70
or we'll have to follow the summation method​

Answer 1

Answer:

Mark it as brainliest

Yes

Step-by-step explanation:

All come under the table of 7 soo

7x4 +7*5+7*6.. 7*10

thus 7(4+5+6+..10)

7(44) = 308

This is an easier approac