To save money for a video game Ajay put $1$ rupee in an envelope. Each day for $8$ days he double the number of rupees from the day before. How much will he save on the eighth day?

Open in App

Solution

Initial sum = 1 Double everyday
It forms a GP with a = 1 & r = 2
$7_{8} = a r^{7} = {1.2}^{7} = 128$

Suggest Corrections

Similar questions

Labourer is engaged for 20 days on the condition that he will receive rupees 120 for each day he works and he will be fined rupees 10 for each day he is absent if he receives rupees 1880 in all for how many days did he remain absent

Q. A child puts one five rupee coin her saving in the piggy bank on the first day. She increases her saving by one five rupee-coin daily. If the piggy bank can hold

190

coins of five rupees in all, find the number of days she continue to put the five rupee coins into it and find the total money she saved.

Q. A child puts one five-rupee coin of her savings in the piggy bank on the first day. She increases her saving by one five-rupee coin daily. If the piggy bank can hold 190 coins of five rupees in all, find the number of days she can contribute to put the five-rupee coins into it and find the total money she saved. [CBSE 2017]

Q. A boy saves

R s 4.65

daily than the least number of days in which he will be also to save an exact number of rupees is

A worker is paid rupees $750$ for $6$ days work . If he works for $23$ days how much will he get?

Join BYJU'S Learning Program

To save money for a video game Ajay put 1 rupee in an envelope. Each day for 8 days he double the number of rupees from the day before. How much will he save on the eighth day?

Initial sum = 1 Double everydayIt forms a GP with a = 1 & r = 278=ar7=1.27=128

To save money for a video game Ajay put $1$ rupee in an envelope. Each day for $8$ days he double the number of rupees from the day before. How much will he save on the eighth day?

Initial sum = 1 Double everyday
It forms a GP with a = 1 & r = 2
$7_{8} = a r^{7} = {1.2}^{7} = 128$