Question

The sum of first 100 odd numbers1,3,5,....is 10000.How much is the sum of 100 odd numbers starting from 21?​

Answer 1

Answer:

Sum= 12000

Step-by-step explanation

21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99+101+103+105+107+109+111+113+115+117+119+121+123+125+127+129+131+133+135+137+139+141+143+145+147+149+151+153+155+157+159+161+163+165+167+169+171+173+175+177+179+181+183+185+187+189+191+193+195+197+199+201+203+205+207+209+211+213+215+217+219=12000