A boy decided to save by an unusual method. He put 1cent, the first week. 2cent in the second week, 4xent in the third week, 8cent in the fourth weekand so on, he gave up after 10 weeks

Step-by-step explanation:

for 1st week=1 ¢

for 2nd week = 2¢

for 3rd week = 4¢

for 4th week=8¢

for 5th week=16¢

for 6th week=32¢

for 7th week=64¢

for 8th week=64+64=128¢

for 9th week = 128+128=256¢

for 10th week = 256+256=512¢

.: he saved a total of

1+2+4+8+16+32+64+128+256+512=1023¢

1023¢=1023/100=$10.23