Math, asked by mohan8438, 4 months ago

Find the sum A)1+2+3+..... 20
B)3+6+9+.... 60
C)5+8+11.... 62

Answers

Answered by netajisimha143

1

Answer:

1) 210

2)630

3)670

Step-by-step explanation:

1+2+3+4+5+6+7+8 +9+10+11+12+13+14

+15+16+17+18+19+20 = 210

3+6+9+12+15+18+21 +24+27+30+33+36 +39+42+45+48+51+54+57+60 = 630

5+8+11+14+17+20+23 +26+29+32+35+38 +41+44+47+50+53+56+59+62 = 670

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